'There is even someone to carry the bags. I don't have an entourage, I don't like dealing with so many people. I don't have any friends on the tour - but it's not sad for me, don't worry,' Safin said.

'Tennis is now just a huge business, and everyone is hungry for money, of course.'

Elsewhere on court, Russian third seed Dmitry Tursunov was forced out by a left ankle injury, giving a 6-4, 0-1 second-round win to 205-ranked Australian qualifier Carsten Ball, who reached the first quarter-final of his career.

Ball will next face American John Isner, who got lucky after turning his ankle but still managing a 6-3, 7-6 (11) second-round defeat of Marcos Baghdatis.

Isner, an Indianapolis semi-finalist last weekend, was seen by the trainer after he crashed to the cement late in the second-set tiebreaker.

After treatment, he was able to walk to the sidelines and resume the match, which he won a few moments later.

'I thought it was worse than it was,' said Isner, who withdrew from the doubles as a precaution.

'But I don't think I could have gone three sets. I really had to win it in two. I stayed calm when I was finishing the match. I didn't panic. I knew I was playing well and serving well.'

He struck 11 aces to squeeze into his fourth quarter-final of the season.