As a professional tennis player, she is contractually obligated...

As a professional tennis player, she is contractually obligated to participate in these press conferences after a match.

It is there in black and white in the contract.

If she has mental health issues, maybe she is not fit enough to play and fulfil her obligations, as stated.

Sorry to be a hard arse, but that is the job. And she is remarkably well rewarded for her work.

AL