Donald crept to eight under in the afternoon rain at Medinah

Tiger Woods birdies the last for a 68 to join partner Geoff Ogilvy (68) and Davis Love (69) on seven under.

Fred Funk, Chris Riley and David Toms are six under with Spain's Sergio Garcia (70) in a group on five under alongside the likes of Mike Weir (67).

Phil Mickelson also birdies the 18th to inch back to four under.

0035: Phil Mickelson sticks his umpteenth drive into the rough on 18 but conjures a miraculous approach over some trees and the greenside bunkers to within 10 feet.

He holes for birdie, as does Woods from 15 feet, while Ogilvy makes his par four.

0030: Tim Herron joins the leaders by holing a 25 footer on the 9th, his 18th.

0024: Tiger Woods and Geoff Ogilvy par the short 17th but Phil Mickelson is looking a touch ragged and fires his tee shot through the green before charging a chip eight feet past and missing the par putt.

0020: Lee Westwood drops another shot on 18 to finish with a level-par 72 for three under.

0011: Luke Donald just shaves the holes with his birdie putt on 18 but taps in for par and a second 68 for eight under and a share of the halfway lead.

0002: Lee Westwood pars the 17th to stay four under as Jose Maria Olazabal cards 67 for four under.

2350: Luke Donald safely pars the short 17th to stay eight under. But fellow Englishman Lee Westwood bogeys 16 to stumble back to four under.

Meanwhile, Thomas Bjorn bounces back from his opening 80 with a round of 70 for six over. The Dane is a close friend of Darren Clarke, whose wife Heather died last weekend.

2346: Geoff Ogilvy birdies the 15th to pars from Tiger Woods and Phil Mickelson.

2340: Luke Donald misses a birdie putt by millimetres on 16 to stay in a share of the lead on eight under.

2326: Phil Mickelson rolls in an eight-footer to reach five under on 14, while Tiger Woods makes his birdie putt for six under. Geoff Ogilvy escapes with his par after ramming his first putt six feet past.

2316: Luke Donald birdies the 15th to break a run of nine pars and join the leaders on eight under.

2310: Phil Mickelson drives through the back of the short 13th, flops back on to 35 feet and gets down in two for a bogey four and four under. Geoff Ogilvy, meanwhile, slots from 15 feet for birdie and six under. Tiger Woods, with virtually the same putt as Ogilvy, shaves the hole to stay five under.

2255: Geoff Ogilvy is wobbling and drops another shot on 12 via the left and right rough to drop back to five under.

Playing partner Tiger Woods squanders a chance to leapfrog him. The world number one hits a stunning second shot to 10 feet with the ball well below his feet but misreads the putt. Phil Mickelson also makes his par.

2250: Lee Westwood makes a good par at the short 13 after driving into the rough short of the green across the lake. He chips out to six feet and holes the putt.

2235: Geoff Ogilvy thins his chip 30 feet past from the back fringe on 11 and takes two to get down for bogey to drop to six under. Partner Phil Mickelson races his birdie putt past and settles for par, as does Tiger Woods.

Up ahead, Luke Donald misses a 10-footer which would have given him a share of the lead. And Billy Andrade squanders a chance to take the outright lead on 15.

2232: Lee Westwood continues his renaissance with a second straight birdie on 12 to reach five under.

2230: Co-leader Billy Andrade conjures a miraculous par with a 15-footer after trouble in the left rough on 14 to stay eight under.

2225: Geoff Ogilvy has a birdie putt on 10 to join the leaders on eigth under but slides it past. Playing partner Tiger Woods makes a knee-trembling par via two shots from the right rough and the rear bunker. The third member of the trio Phil Mickelson almost chipped in for eagle but settled for birdie.

2213: Lee Westwood, showing impressive resolve, at last begins to make forward progress with a birdie at the 11th for four under.

2206: Jose Maria Olazabal drops his first shot at the 1st, his 10th, after going out in 31, to slip to four under.

2205: Woods, Mickelson and Ogilvy reach the 9th green at a noisy part of the course next to the main road. Planes landing at Chicago's super-busy O'Hare airport add to the effect but all three make par.

2155: American Ryder Cup hopeful Brett Wetterich throws a mini-tantrum on 17 and angrily hacks at his ball a number of times in the rough en route to a triple-bogey seven on 18 to plummet to eight over.

2145: Tiger Woods appears to misread his birdie chance on eight and takes par. Ogilvy and Mickelson also miss their birdie putts as the rain starts to hammer down.

2142: Lee Westwood goes out in 36 to stay at three under despite a turbulent nine holes, which included a double bogey at the first.

2134: Tiger Woods narrowly misses an eagle chance on the long 7th but makes birdie, as do partners Mickelson and Ogilvy.

2125: Northern Ireland's Graeme McDowell is fighting to finish the right side of the cut and three early birdies lifts him right onto the projected number at level par.

2114: Amazing. Mickelson has been nowhere near the 6th until he rams home a 30-footer for par. Woods, who had to hack back onto the fairway, also holes from eight feet for par. Ogilvy, though, slots in a third straight birdie for six under.

2110: Mickelson carves his drive onto a cart track between the 6th and 7th holes and hits a tree as he attempts to find his way back onto his correct hole, the 6th. He hacks his third out of the rough onto the far side of the green, still about 20 yards away.

2100: Tiger Woods goes from a fairway bunker to the back fringe of the green and holes his putt for a birdie on the long 5th. Partner Geoff Ogilvy also makes a birdie the conventional way but Phil Mickelson three-putts for par.

2050: It has started raining at Medinah, which could soften the greens up further and give the afternoon starters an advantage.

2040: Jose Maria Olazabal slots his fourth birdie in five holes at the 14th, his 5th, to reach four under.

2035: Ogilvy makes the first breakthrough in the group with a birdie on the 4th as Mickelson and Woods make par to stay three under.

2030: Luke Donald maintains his momentum with an third birdie on the 5th to get to seven under. Meanwhile, Lee Westwood has had his chances but slips back to one under with a bogey at the 4th.

2022: Woods, Mickelson and Ogilvy all continue on their way with straightforward pars at the 3rd.

2019: Retief Goosen chips in at the 5th to get back to two under.

2010: Luke Donald continues his promising start with a second birdie at the 4th to edge to six under.

2008: Woods, Mickelson and Ogilvy all tidy up for par threes on the 191-yard 2nd.

2005: Spain's Jose Maria Olazabal begins with three straight birdies from the 10th to reach three under.

2000: Tiger Woods saves his par on the 1st after hacking out of the rough as playing partners Phil Mickelson and Geoff Ogilvy also take pars.

1950: Lee Westwood makes some amends for his opening double by holing a long birdie putt on the 2nd to get back to two under.

1935: Tiger Woods, Phil Mickelson and Geoff Ogilvy tee off down the 1st. Mickelson and Ogilvy find the fairway but Woods pulls his drive left and a spectator sticks a hand out to catch the ball and stop it flying further into the trees.

1930: Lee Westwood opens with a double bogey at the 1st to slip back to one under.

1920: Colin Montgomerie cards a one-under 71 to finish four over but will almost certainly miss the cut. Meanwhile, England's Luke Donald birdies his opening hole to reach five under.

1900: Sergio Garcia cards a 70 for five under, while Ian Poulter climbs to four under after his second straight 70. Ernie Els also takes 70 for three under, and David Howell adds another 71 for two under.

1854: American Billy Andrade birdies the 1st to reach six under. Meanwhile countryman Olin Browne, he of the hole-in-one on Thursday, fires a six-under 66 to reach three under for the tournament.

1840: Sergio Garcia grinds to five under with a birdie at the 16th, his seventh. The Spaniard has spent the entire round trying to make amends for a triple-bogey seven at the 11th.

1825: Davis Love ends with a 69, while Shaun Micheel advances to five under for the event with a round of two-under 70.

1810: Henrik Stenson bogeys the last but sets the target at eight under. Meanwhile one-time first-round leader Davis Love, who was flying until a triple-bogey on the short 17th on Thursday, hauls himself back into the frame with three back-nine birdies.

1805: Sergio Garcia birdies the 5th, his 14th, to edge back to four under for the tournament.

1758: Henrik Stenson birdies the 197-yard par-three 17th over the water to get back to nine under.

1754: American Woody Austin sets an early clubhouse lead at four under after a second-round 69.

1750: US-based Swede Carl Pettersson was on a roll but bogeys the 11th and follows up with a double on 12 to drop back to level overall.

1736: Popular American John Daly suffers while those around him make hay and drops his fourth shot of the day at the short 2nd, his 11th, for three over.

1725: Henrik Stenson drops his first shot at the par-four 15th to slip to eight under.

1705: Leader Henrik Stenson picks up another shot at the short 13th to reach nine under. Meanwhile, Australia's world number six Adam Scott hauls himself to four under - three under for the day - after 14 holes.

1656: Colin Montgomerie spoils his early move with a bogey at the 18th, his ninth to slip back to one under for the day and four over overall.

1645: US-based Swede Daniel Chopra climbs from 58th overnight to tied third with five birdies in his first 10 holes.

1625: Stenson birdies the par-four 11th to move to eight under and a two-shot lead. The Swede is relishing his spell at the top of the leaderboard.

1612: Riley drops a shot to fall back to five under.

1551: Byrd joins Glover and Riley on six under with another birdie at the 8th.

1545: Stenson takes the outright lead with his third birdie of the round at the 9th. He goes out in 33 with three birdies in his opening nine holes.

1531: Scot Colin Montgomerie, who slumped to a five-over 77 on the opening day, needs to get things going to make the cut and starts well with a birdie at the first and follows it up with two pars.

1525: Love struggles despite his positive start and cards three straight bogeys but claims a shot back at the 14th, his fifth, to move to three under.

1516: Garcia recovers quickly from his disaster at the 11th and birdies the next to return to two under.

1511: Ian Poulter, handily placed on two under after the first round, bogeys the 3rd and 4th to slip back to level par.

1502: American Sean O'Hair, who won the John Deere Classic in 2005, has had an electric start and is just one off the lead. He birdies three of his opening four holes before firing an eagle-three at the 5th. Jonathan Byrd is also on five under with two straight birdies at the 4th and the 5th.

1456: Riley is having a mixed day and his second bogey sees him slip back into the pack on six under.

1452: Spain's Sergio Garcia gets a boost when he birdies the 10th, his first, but any early momentum soon dissipates as a triple-bogey seven at the next puts him on one under.

1448: Australian Adam Scott moves up the leaderboard with two early birdies and is now on three under overall.

1438: Rose has had a steady start to his day and is back in credit overall with a birdie at the par-five 5th, his second of the round.

1426: Love is now back on four under, courtesy of a bogey at his 2nd.

1410: Davis Love birdies the 10th, his first, to join Billy Andrade on five under - two behind Riley.

1402: It has certainly been an interesting start for Riley. He claims another shot at the 3rd and is again on his own in the lead.

1354: Sweden's Henrik Stenson has had a dream start and is sharing the lead on six under. He birdies the first thanks to a superb eight-iron recovery from a fairway bunker and does the same at the next when his seven-iron tee shot finishes just two feet from the hole.

1349: Riley soon slips back to six under however, thanks to a bogey at the par-three second after just missing the lake.

1335 Britain's Justin Rose, tied for 41st after a first-round 73, gets off to a good start with a nine-foot birdie putt at the second to move back to level par.

1330: Joint overnight leader Chris Riley birdies the first hole of his second round to move to seven under.