PARIS, JUNE 1 -- The action on the courts in the first week of the French Open has been weird enough. Michael Chang barely avoided the upset bug today, but things got even weirder off the court as a feud erupted over Andre Agassi's neon-colored outfits.

The fashion controversy virtually overshadowed a dramatic victory by defending champion Chang, who rallied from two sets down to defeat Swedish qualifier Christian Bergstrom, 2-6, 5-7, 6-0, 6-2, 6-4.

Chang was joined in the round of 16 by two other Americans, Agassi and Jim Courier. The third-seeded Agassi crushed French qualifier Arnaud Boetsch, 6-3, 6-2, 6-0, and No. 13 Courier swept Johan Anderson of Australia, 6-0, 6-2, 6-1.

As he has throughout the week, Agassi wore a hot pink and black shirt, matching headband and black denim shorts over pink stretch cycling shorts.

While he was serving for the match at 5-0 in the third set, tournament officials announced they were considering banning such outfits in the future. They said they might require players to wear "predominantly white" attire, a rule at Wimbledon.

"If players go too far in their attire then something will have to be done," Philippe Chatrier, president of the French and International Tennis federations, said in a written statement.

Agassi called tournament organizers "bozos" who had nothing better to do.

Upsets already have claimed the two top-seeded men, Stefan Edberg and Boris Becker, and defending women's champion Arantxa Sanchez Vicario. Today the tournament came close to losing Chang, who was returning to Court Central for the first time since winning the title last year at age 17.

Down two sets, he came back to win in a 3 1/2-hour match that rekindled memories of his epic, five-set victory over Ivan Lendl in the fourth round last year.

Ranked 106th in the world, Bergstrom never has won a pro title or gone past the third round of a Grand Slam event. "I didn't have the fear of being blown off the court," Chang said.

Chang won nine straight games to win the third set and go up, 3-0, in the fourth. He closed out the set with an ace.

"I kind of felt that no one expects me to come back and win," Chang said. "It took a little pressure off. I think he let up a whole lot."

Bergstrom began hitting with authority again in the fifth set. "The fifth set was a dogfight," Chang said.

Chang's next opponent will be Javier Sanchez, whose older brother Emilio, the sixth seed, was eliminated in the second round.

But the showcase match in the round of 16 figures to be Agassi against Courier. Courier upset Agassi in the third round last year.

"I'll feel very confident, to say the least," Agassi said. "I'll go out there ready for a fight. I'm going to make him earn his money. The longer it goes, the less chance he's going to have of winning. If he wants to win, he'll have to blow me out pretty quick."

Also advancing to the fourth round were eighth-seeded Andrei Chesnokov of the Soviet Union, and unseeded Henri Leconte of France and Jonas Svensson of Sweden.

Women reaching the fourth round were No. 4 Gabriela Sabatini of Argentina, No. 6 Conchita Martinez of Spain, No. 8 Katerina Maleeva of Spain, No. 11 Jana Novotna of Czechoslovakia, No. 15 Nathalie Tauziat of France, Nicole Provis of Australia and Wiltrud Probst of West Germany. Top-ranked Steffi Graf's match against Sandra Cecchini of Italy was postponed because of late-running matches.