Andy Murray arrived at the U.S. Open ranked number two and has an admirable 37 wins on hard court surfaces just this season alone. He was looking for his first Grand Slam this year, but has been knocked out in round four after a match to Croatia's Marin Cilic that ended 7-5, 6-2 and 6-2 on Tuesday. He called his state of mind disappointed, and said that he struggled and played poorly in round four.

Part of that may have been due to a wrist injury, which he said had been bothering him for about a week. He kept rubbing it during the second set. If he had won the Grand Slam title he would have been the first British men's player to do so since the 1930's. Daniel Nestor of Toronto and Serbia's Nedad Zimonjic were also knocked out this round, after they lost to Max Mirnyl and Andy Ram in the men's double QF. This will be Marin Cilic's first major quarter final of his entire career.

Most of the focus has actually been on the women's competition this year, thanks to the plays made by seven year old Melanie Oudin from America, and Kim Clijster's surprising comeback. Oudin has advanced to her first major quarter final, although her career has been a short one, and Clijsters has already won her spot in the semis.

She has a winning streak of 12 matches, but arrived unranked because she was only in two tournaments prior to this Grand Slam event. Another women's player that was watched by fans was Serena Williams, who advanced to the semi-final round as well, after beating Flavia Penneltta 6-4, 6-2, two quick sets. Williams is the number two seed for the women. More U.S. Open action continues tomorrow.