"Little did I know I have 22-inch guns and a disappearing birthmark on my right arm," Roddick, 24, wrote on his blog after seeing this month's issue of Men's Fitness, which features Roddick with a body that had been artificially bulked up, the New York Post reports.
"I saw the cover for the first time when I landed in Rome. It was pretty funny. Maybe [fellow tennis star] Rafael Nadal wants his arms back?"
Reps for Men's Fitness told the Post that the cover image featured an enhancement of Roddick's arms, and was not a Photoshopped image with Roddick's head on a different body.
But Roddick has more serious things to worry about lately than a doctored photo. The tennis champ, who is currently ranked No. 3, was knocked out at the first round of the French Open on Tuesday.