Roger Federer bemoans Rafael Nadal's injury

Roger Federer, Rafael Nadal
© PA Photos
Roger Federer says that the absence of Rafael Nadal from the US Open is "disappointing".

Swiss tennis player Roger Federer has said that the absence of Rafael Nadal from this year's US Open is "disappointing" for the game.

The Spaniard withdrew from the final Grand Slam of the season on Wednesday because of his knee tendinitis problems.

Nadal was also forced to pull out of the London Olympics due to the same injury and subsequently withdrew from ATP Tour events in Toronto and Cincinnati.

Speaking at the Cincinnati Masters, Federer admitted that Nadal's absence from the US Open is a blow for the followers of the sport.

"It's not a surprise, because I wrote him and he told me it wasn't looking good at all," he said.

"I kind of saw it coming. But obviously when it's official, it's disappointing for tennis, there's no doubt about it."

Federer also expressed his concern over Nadal's long-term fitness.

"I would love to have him in the draw," stated the 31-year-old. "With 12 days before the Open you figure he might still have time to fix what he has to fix to get ready.

"If he pulls out that early before the Open, it must be something serious. That's what is sort of scary. There is obviously the whole debate going on if he is going come back for this year.

"I hope in hindsight this is a very smart decision by him. But it's obviously a big blow and disappointing news for the tennis world."

The US gets underway in New York on August 27.

Roger Federer
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ATP RankingsPoints
1Scotland flag Andy Murray7,750
2Spain Rafael Nadal7,555
3Switzerland Roger Federer7,145
4Switzerland Stanislas Wawrinka5,780
5Serbia Novak Djokovic5,325
6Croatia Marin Cilic5,155
7Alexander Zverev4,470
8Austria Dominic Thiem4,030
9Japan Kei Nishikori3,285
10Canada Milos Raonic3,230
11Bulgaria Grigor Dimitrov3,070
12France Jo-Wilfried Tsonga2,770
13Belgium David Goffin2,560
14Spain Roberto Bautista Agut2,425
15Czech Republic Tomas Berdych2,390
16United States Jack Sock2,335
17Pablo Carreno Busta2,305
18Lucas Pouille2,220
19United States John Isner2,110
20United States Sam Querrey2,060