The Spaniard explained that the ailment is not impacting on his forehand, but admitted that having his palm taped up is affecting his serve.
"With the forehand, it's not a big issue," BBC Sport quotes him as saying. "With the serve, a little bit. I feel that with the tape I can lose the racquet when I'm serving. That's my feeling - the racquet can go.
"That's a terrible feeling for a serve, because then when you have this feeling you are not able to accelerate at the right moment. You lose a little bit the coordination. That's a big deal."
Nadal has not lost to Federer at a major since the Swiss defeated him in the 2007 Wimbledon final, and holds an overall 22-10 lead over him in their head-to-head.