British number one Andy Murray has confirmed he will play at Queen's Club in June ahead of Wimbledon.
The 23-year-old Scot, who won the Aegon Championships in 2009, will line up alongside the world's top two, Rafael Nadal and Novak Djokovic.
Former US Open winner Juan Martin del Potro and four-time Queen's champion Andy Roddick will also feature.
"Winning my first grass-court title here in 2009 was an amazing feeling," said Murray.
"It means a lot to me to have my name on the trophy next to great champions such as John McEnroe, Pete Sampras and Rafael Nadal who have won it in the past.
"The Queen's Club has some of the best grass courts in the world, there are packed crowds every year and there is always a great atmosphere. Usually players that have done well at Queen's have gone on to do well at Wimbledon. I can't wait to get playing."
who won the US Open in 2009,
missed eight months of the 2010 season with a serious wrist injury but has been making his way quickly back up the rankings this year.
Del Potro targets improvements on grass
"I missed everything - the tournaments, the fans, the stadiums, the other players, I really missed everything," said the 22-year old Argentine.
"But now I'm here again and I'm trying to play a good level. Everything was difficult after my surgery, but those bad things are the past. Now I am having a good present, I'm healthy, and if I work and still improve my game, I will have a good future."
Del Potro lost to Nadal on his only previous appearance at Queen's Club in 2007 and is determined to improve on grass.
"I like London, I played at the Aegon Championships a couple of years ago and I really enjoyed it," he commented.
"If you want to be a really good player you have to win on grass courts. I never had good results on grass before so this year could be a chance for me to improve my game on grass at Queen's and at Wimbledon.
"I have to learn many things on that surface but I will be ready to do it. Any tournament I play I want to win and If I can play my best level I think I can do it."
Wimbledon is the most important tournament of the year for me
Roddick won the title at Queen's Club in 2003, 2004, 2005 and
putting him alongside McEnroe, Boris Becker, Lleyton Hewitt, Roy Emerson, MJG Ritchie and AF Wilding as the only four-time winners.
"Over the years I've had a lot of success at Queen's Club. It has real tradition and I love the whole month in London," said the American. "Queen's has the best grass courts in the world - they play perfectly and so the Aegon Championships is a great way to prepare for Wimbledon."
"Wimbledon is the most important tournament of the year for me," said the two-time All England Club semi-finalist.
Djokovic excited by Queen's prospect
The Serbian will be joined at Queen's Club by Nadal, raising the possibility of a repeat of their 2008 final.
"Rafa and I had an incredible match in the Queen's final in 2008 and it was the closest I ever got to a grass-court title," said Djokovic. "I really want to do well at Queen's and at Wimbledon this year."
Nadal beat Djokovic 7-6 (8-6) 7-5
in that match
before going on to win his first Wimbledon title three weeks later.
Djokovic lost to Xavier Malisse in the last 16 at Queen's Club last year but still managed to reach the Wimbledon semi-finals, losing in straight sets to Tomas Berdych.
This year's Aegon Championships take place from 6-12 June and will be broadcast live by BBC Sport.
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