I've heard in the past that Nadal actually wasn't injured some years ago when he didn't play a long time, but he was found doped and his case was hidden by ITF.
Farhod Umirzakov ,Para powerlifting world champion many times ...9 years ban
https://www.paralympic.org/press-release/uzbek-athlete-farhod-umirzakov-nine-year-ban-anti-doping