Just when the US Open is getting down to the crucial matches, world No 1 Novak Djokovic found himself in a flawless zone that even he rarely reaches to put himself in the quarterfinals.
Stanislas Wawrinka spared a thought for an absent countryman after he powered through a high-quality match against Czech Tomas Berdych to reach the quarterfinals of the US Open.
Switzerland's Stanislas Wawrinka powered through a high-quality match against Czech Tomas Berdych on Tuesday to reach the quarterfinals of the US Open.
Defending champion Serena Williams walloped Spain's Carla Suarez Navarro 6-0 6-0 to race into the semifinals of the US Open on Tuesday.
No. 5 seed Li Na overcame the second set lose to beat Ekaterina Makarova from Russia 6-4, 6-7 (7- 5), 6-2 on Tuesday en route to women's singles final four, becoming the first Chinese player to reach US Open semi-final.
Rafael Nadal came back to beat 22nd-seeded Philipp Kohlschreiber of Germany 6-7 (4), 6-4, 6-3, 6-1 on Monday night in the fourth round.
Former world number one Roger Federer was knocked out of the US Open on Monday by Spain's Tommy Robredo.
Agnieszka Radwanska refused to use a recent personal tragedy as an excuse for her shock exit from the US Open on Sunday.
Li Na notched another pay-back victory at the US Open, beating former world number one Jelena Jankovic 6-3 6-0 to advance to the quarterfinals on Sunday.
But the possibility of air strikes against Syria has recalled some painful memories for Serbia's Novak Djokovic and Ana Ivanovic, who broke from their usual routine at the US Open to talk about their personal experiences with war.
Serena Williams easily won her eagerly-awaited clash with Sloane Stephens at the US Open on Sunday as normal service resumed at the last grand slam of year.
Li Na avenged her recent loss to Jelena Jankovic of Serbia by thrashing the former world No 1 in straight sets to reach the quarterfinals of the US Open.