Twenty-time Grand Slam champion crushes clay misconception.
Stan Wawrinka's Grand Slam return will have to wait.
The 39-year-old will listen to his body and decide if he can continue his run in Paris on Sunday.
Round of 16 singles action begins on Sunday at Roland-Garros
Three Italian men are into the round of 16 at the same Grand Slam for the first time in Open Era history.
American No. 1 hopes to be back in time for Wimbledon.
Sloane Stephens scored her second straight Top 20 win at Roland Garros.
