Roger Federer’s US Open preparations could be in danger after the 17-time Grand Slam winner was beaten in his opening match at the Swiss Open while playing with back pain.
The top seed, who was attending the small claycourt event for the first time since winning it nine years ago, was also dealing with the added stress of testing a new larger racquet, coping with his physical limitations and facing a big hitter in Daniel Brands.
The German produced a 6-3, 6-4 win to make the quarter-finals, coming good after taking the Swiss star to three sets in Hamburg last week.
Federer, 31, who has been troubled occasionally in a relatively injury-free career by back spasms, said that he has been dealing with them for a few weeks now.
He hinted that he will be taking a late decision on whether or not to play the Montreal Masters, a key US Open warm-up event, which begins a week from Monday on August 5.
“I’ve had serious problems with the back, I had to get some anti-inflammatories last week in Hamburg due to the pain,” he said after Thursday’s loss, his third of the summer against an opponent ranked outside the top 50.
Federer is currently ranked fifth in the world, his lowest level in a decade after going out in the Wimbledon second round to Sergiy Stakhovsky and then losing last week in the Hamburg semi-finals to Argentine qualifier Federico Delbonis.