MADRID, Spain -- Yevgeny Kafelnikov's sore left foot forced him out of his first-round match Tuesday at the Tennis Masters Series in Madrid.

The Russian lost the first set 6-3 to Thomas Enqvist of Sweden before quitting the match.

"I thought I could play, but unfortunately ... it's tendinitis,'' Kafelnikov said. "I've had it since losing in the second round at the Kremlin Cup, about two weeks ago. I just had an MRI and it showed on the picture.''

Last Tuesday, bookmakers reportedly suspended betting six hours before Kafelnikov's match in Lyon, France, against Fernando Vicente after a big wager was placed on Vicente, winless since June.

Vicente won in straight sets. There was no suggestion that either player was involved in any wrongdoing. No investigation was made by the ATP.

"There was a conclusion onsite ... that Yevgeny may not have played his best tennis,'' ATP chief executive Mark Miles said in Madrid. "But he was giving a professional effort.''

Kafelnikov, who beat Enqvist in the 1999 Australian Open final and won the 1996 French Open for his only other major individual title, was upset about the match-fixing allegations in several newspapers.

"To read what you guys are writing, that I have been involved in match-fixing in men's tennis, is definitely hurting my feelings,'' Kafelnikov said. "All I can tell you is that tennis players have never been involved in match-fixing. We are playing for our living.''

Kafelnikov, who has played on the tour since 1992, felt bad after arriving in Spain.

"When I walked in yesterday morning in the locker room all the players looked at me like I'm the worst enemy of all time,'' he said. "This is completely tearing me apart. And back home in my own country, where people basically look at me like a role model, now they look at me like the worst enemy.''

Wayne Ferreira, an experienced South African who has been on the tour since 1989, said earlier that an injury bothered Kafelnikov in Lyon.

"I know for a 100 percent fact that Yevgeny had a bad foot and was injured,'' Ferreira said. "I know playing doubles with him for a long time, he's had this problem before. He told me it was back. He tried his best and just couldn't win.''

Marat Safin, another Russian, also fell to a Swede, losing 4-6, 7-5, 6-4 to Jonas Bjorkman. Safin, who struggled with a wrist injury for much of the year, has not won since the semifinals in Barcelona in April.

All four seeded players lost their second-round matches.

Feliciano Lopez delighted the home crowd that stayed until near midnight by beating ninth-seeded Mark Philippoussis 6-4, 3-6, 6-3; Nicolas Massu ousted No. 13 Gustavo Kuerten 6-3, 7-5; Juan Ignacio Chela topped No. 11 Martin Verkerk 6-2, 6-2; and Vincent Spadea outlasted No. 12 Agustin Calleri 7-6 (5), 3-6, 6-3.

Earlier, Mardy Fish beat Tim Henman 7-6 (4), 6-3 to put four Americans into the second round.

Jan-Michael Gambill also won his first-round match 6-3, 6-3 over Nikolay Davydenko.

Fellow Americans Vince Spadea and Robby Ginepri also won Monday.

James Blake, another American, fell to Max Mirnyi 7-5, 6-2. Mirnyi will face Andy Roddick on Wednesday. Roddick is chasing the No. 1 ranking this week and an unprecedented third straight Tennis Masters Series title after winning Montreal and Cincinnati.