Florence Griffith Joyner said she has an Achilles tendon injury that may jeopardize her chance for an Olympic comeback.

The three-time Olympic gold medalist, who has been training for the Atlanta Games in the 400 meters, has tendinitis in her right leg and will undergo an MRI exam this week to determine if she can continue training or will need surgery.

Griffith Joyner, 36, still needs to make a qualifying time for the 400 meters before the U.S. Olympic track trials begin June 14 in Atlanta. There are only two track meets left in which she can do that, she said.