I've been asked a lot lately if tennis is clean or not. I don't know any more how you judge whether a sport is clean. If one in 100 players is doping, in my eyes that isn't a clean sport. ↗
What I would pay much more attention to are the few points where the player can inadvertently make a career decision. Most players end up back-tracking, though some actually enjoy this. ↗
Something interesting has happened over the last 10 years in the Premier League. Players who once would have been discarded as expensive and too old have become important parts of title-winning squads. ↗