The 2005 US Open was the fourth and final Grand Slam of 2005. It was held between August 29, 2005 and September 11, 2005. The "9/11/01" sign to remember the 9/11 attacks was not featured on the court. It was, however, featured during the 2011 U.S. Open final between Novak Djokovic and Rafael Nadal, and the 2016 U.S. Open final between Novak Djokovic and Stan Wawrinka, respectively. Roger Federer was successful in defending his 2004 title, defeating Andre Agassi in the final. Svetlana Kuznetsova was unsuccessful in her title defence, losing in the first round against compatriot Ekaterina Bychkova. Kim Clijsters won her first Grand Slam title after four previous Grand Slam final losses. It was the first of three US Open titles for Clijsters, also winning in 2009 and 2010. This was the first time that future US Open champion Andy Murray was featured in the tournament.
Seniors
Men's singles
Roger Federer defeating Andre Agassi, 6–3, 2–6, 7–6, 6–1
It was Federer's 10th title of the year, and his 32nd overall. It was his 6th career Grand Slam title, and his 2nd US Open title.
* Defending champion Svetlana Kuznetsova of Russia became the first defending women's champion to lose in the first round during the Open Era. She lost to Ekaterina Bychkova 6-3, 6-4. It marked the fourth time a women's defending champion was ousted in her first match.
* Ninth-seeded Gastón Gaudio also lost in the first round. He was beaten by wildcard Brian Baker in straight sets: 7-6, 6-2, 6-4.
* Indian teen sensation Sania Mirza became the first Indian woman to reach the 4th round of any Grand Slam.
Day 5
Day 6
* American James Blake takes out No. 2 seed - and one of the candidates to win the title - Rafael Nadal of Spain. James Blake declared the player of the day for the 2nd time in the tournament.
* Roger Federer loses his first set of the tournament against Nicolas Kiefer of Germany. He progresses in four sets.
* Kim Clijsters of Belgium continues to dominate the hardcourt summer. Her victim in the quarter-final was Venus Williams. Clijsters wins 4-6, 7-5 and 6-1.
Day 10
* Both Andre Agassi and Robby Ginepri needed five difficult sets to beat James Blake and Guillermo Coria in their quarter-final matches.
* Second seed Lindsay Davenport loses in three sets to Russian Elena Dementieva and for the first time since 1994 there are no American representatives in the women's semifinals.
Day 11
* Daniela Hantuchová and Mahesh Bhupathi are champions in Mixed Doubles against Katarina Srebotnik and Nenad Zimonjić.
Day 12
*Twin brothers Mike and Bob Bryan, after being runners-up at the other three Grand Slams, are champions for the first time in the US Open in the Men's Doubles championship, winning the 1st Seed Jonas Björkman and Max Mirnyi.
Day 13
* Kim Clijsters wins her first Grand Slam title after defeating Mary Pierce in 6-3, 6-1.
Day 14
*Roger Federer wins the title defeating Andre Agassi in four sets.
Player of the day
Day 1 - Brian Baker for upset defeat of Gastón Gaudio
Day 2 - James Blake for a comeback after injury-marred 2004
Day 3 - Sania Mirza for winning the match despite bleeding toes
Day 4 - Andre Agassi for second most wins in the US Open history
