MELBOURNE, Australia -- Steffi Graf might make a comeback to tennis at Roland Garros to honor a promise to husband Andre Agassi if he wins a fourth Australian Open.

Agassi said Tuesday that if he can win the men's title at Melbourne Park on Sunday, former world No. 1 Graf would have to partner with him in mixed doubles at the French Open.

"For the record, and you're the first to know this, if I win here Stef has to play doubles with me in Paris," Agassi told the Australian Open's official Web site when asked who his dream mixed doubles partner would be.

"You can print that and I'll hold you to it," he was quoted as saying.

Agassi had earlier told the center court crowd at Melbourne Park that he had been practicing with Graf and she was still in good form.

"You think I'm an inspiration at 32, you should see her at 33," Agassi said. "She always wins ... the problem is, I can't keep my eye on the ball."

Agassi and Graf were married in Las Vegas in October 2001, and have a son, Jaden Gil, who is 15 months old.

Graf retired in July 1999, weeks after collecting a sixth French Open title with a win over Martina Hingis in the final.

Graf won 22 Grand Slam singles titles, putting her second on the all-time list behind Australia's Margaret Court with 24.

Graf is in Melbourne with Agassi for the Australian Open.

Agassi is the favorite to win the title after advancing to the semifinals Tuesday with a powerful 6-3, 6-2, 6-2 win over France's Sebastien Grosjean.

Graf previously played mixed doubles with John McEnroe at Wimbledon in 1999, when they reached the semis before she withdrew due to illness.