We should be appreciative of Federer though, because we will never see anything like him again. The fact he can still compete for slams ever after the erosion of his physical skills is really a greater testament to the natural talent he has than the period of time when he was dominating the tour.
that's because his last match was the one they were investigating, and he was provisionally suspended right after:
Following his failure to co-operate with the TIU, Mr Kryvonos was provisionally suspended from playing professional tennis on 30 November 2015. The 10-year suspension imposed today has therefore been backdated to include this period of exclusion. It will expire on 29 November 2025. TIU Media Release | Tennis Integrity Unit