[Lord Snooty]

A bad couple of days for Djokovic. Lost again today so he misses the medals altogether. Then pulled out of the Mixed Doubles meaning his partner missed out as well.
That's not how Olympic team work works, Novak. If you haven't the fitness to play two matches in the day, pull out of the singles. They're all three set matches in this so what are you losing?
Very selfish. Should've had a look over at the GB camp and seen what Andy Murray did when he had a slight niggle. Pulled out of the singles to commit to getting Joe Salisbury a medal. Which didn't work out in the end but that's the Olympic spirit.

And petulanly smashing a racquet and throwing another into the empty seats isn't a good look either.

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I don't agree. If she knew she was injured and supposed to be out for 3 months, she should have stepped down and let someone else go.

Sounds to me like her coach pulled her out of the 200. And the 3 months diagnosis was the original one, which she subsequently got a second opinion for. That turned out to be showing she didn't have a tear and so surgery wasn't needed.
To say this was just six weeks ago, shows how well she's done to get this far and as a genuine medal prospect, had every right to give it a go.