Why would getting injured before but not during matter, if you're calling out injury? And it wasn't all knee. I thought the Fed fans were saying he never should have played Canada in 2017, chasing the #1. And i thought the argument was that he DID hurt himself in the final v. Zverev, which in turn hampered his USO that year, which Nadal won, and secured him the YE#1. There was a lot of bitter complaining from the Federer fans over all of that, and I have a hard time picturing you not being amongst them. In the 2019 match v. Dimitrov, Roger lost the 4th set and went off the court to have some upper-groin type issue looked at. It was rather a lengthy MTO. He played the match out, and lost, and the Fed fans, including you, pointed to his injury. When I pointed out the notion that taking a long MTO at the end of the 4th could also be considered gamesmanship, esp. against an opponent who had never beaten you, Fed fans, without the slightest irony, said it's not gamesmanship if you're really injured. To which I just nodded my head and smiled.