All the latest from round three (all times BST).American Chris DiMarco marches to 13 under with Tiger Woods on nine under and Denmark's Thomas Bjorn on eight under as the sun sets on Augusta.
Vijay Singh slips to four under with Australians Mark Hensby and Rod Pampling as Phil Mickelson slides to three under.
England's Luke Donald creeps back into the group on three under as countryman David Howell recovers to two under.
Ernie Els' challenge appears to be over as he slumps to six over.
Latest updates:0034: Augusta officials sound the hooter, telling players they may come in for bad light straight or may stay and finish their hole.
0028: Tiger Woods reaches nine under with a front nine of 31.
0020: The DiMarco machine rolls on as he drains a 20-footer for birdie on the eighth. Playing partner Thomas Bjorn also makes his birdie to get back to eighth under.
0015: Tiger Woods and David Howell both birdie the eighth to reach eight under and two under respectively.
0006: Chris DiMarco birdies seven as Vijay Singh birdies eight, while Thomas Bjorn three-putts on seven to slip back.
0004: Luke Donald birdies 13 to get back to three under par.
2358: Tiger Woods goes through seven holes in three under to reach seven under overall.
2350: Luke Donald moves back to two under with a birdie at the 12th after a disappointing second-round 77. Former champion Mike Weir also gets to two under through 12.
2341: Phil Mickelson makes amends with a birdie at the seventh to get back to four under.
2325: England's Luke Donald keeps fighting and gets back to one under at the 10th as Phil Mickelson drops a shot at the sixth.
2323: A fired-up Thomas Bjorn bags another birdie at the third to reach eight under.
2318: As soon as Chris DiMarco stretches to 11 under, Tiger Woods and Phil Mickelson come back at him while David Howell passes them rapidly going the other way.
2303: Tiger Woods leaves his eagle putt short but takes the birdie to go five under on the long second.
2254: Thomas Bjorn slots in a 15ft birdie putt on the first to get to seven under.
2251: Kirk Triplett, amateur Ryan Moore and Mark Hensby all join Vijay Singh on three under.
2250: David Howell sees his chip to the first green slide back to his feet, on his way to a double-bogey six.
2243: American journeyman Kirk Triplett is embarking on a mini charge with a second straight birdie on the third to reach three under.
2237: Darren Clarke, resplendent in an orange shirt and white check slacks, birdies the 12th, his third, to get back to three over.
2234: David Howell and Tiger Woods set off the down the first as Vijay Singh makes his par to stay three under.
2232: American Kirk Triplett birdies the second to get to two under and a share of sixth.
2212: Phil Mickelson tees off on the first in company with American amateur Ryan Moore.
2211: Ian Poulter makes par the hard way on the 15th, his sixth, after a shank with his second. He stays two over.
2203: Luke Donald gets back to level par with a birdie at the fourth.
2155: American Steve Flesch reaches one under with a third birdie at the sixth.
2145: Australian Stuart Appleby picks up two early shots at the second and third to reach one under par for the tournament.
2122: Past Masters winner Fred Couples, who has made 21 straight cuts at Augusta since his debut in 1983, birdies the third to get to one over.
2100: Former Open champion Justin Leonard birdies his first two holes from the 10th to get to level for the tournament.
2030: The third rounds gets underway with play beginning again off both the first and 10th tees.