Tommy Haas makes a superb start to his quarter-final against Nikolay Davydenko, taking the first two sets

Davydenko cannot match the heights he hit against Andy Murray in the previous round and looks to be on his way out

But with Haas struggling physically, Davydenko takes advantage to level at two sets all

Davydenko needs two chances but holds his nerve to serve out for a dramatic 4-6 6-7 (3-7) 6-3 6-4 6-4 win

Roger Federer and James Blake square up for the night match on Arthur Ashe Stadium court in their quarter-final

Blake gets plenty of support from 23,000 New Yorkers and makes a good start but misses three set points and falls behind

Federer is at his breathtaking best as he wins the second set 6-0 and moves a break up in the third

Blake has plenty to consider as he looks like being the latest man to be on the end of a Federer masterclass

But Blake's supporters - the 'J Block' - still believe in their man and help carry him through the third set tie-break

Federer storms to a 5-1 lead in the fourth set but lets Blake back in and is a happy man after finally edging through

Blake congratulates Federer after the defending champion wins 7-6 (9-7) 6-0 6-7 (9-11) 6-4