In tennis or any other sport, the worst enemy of an athlete is ALWAYS themselves! It's always been the case! If you reach an elite level where you're in the top 100, you're obviously the best in that sport, but it's performing in the clutch that makes them GOATs & BOATs! I gave an example a while back about basketball players who in practice might not miss a shot, but in a game, it's not unusual for a whole team to go cold and miss everything, including free throws for 5+ minutes! In tennis we see a good drubbing ever so often, even if both players are playing well;
2019 AO Final the best example of it! Right now most athletes' problems have to do with expectations! We weight kids down with it all the time! It's gone all the way to high school basketball and football where I see some overachiever making the hightlight reel on ESPN! It worked out for LeBron James, but many are crippled emotionally early on and are never heard from again! I think Stefano will make it, but the DAD has to pull back! You don't want this kind of reputation!