I'm really looking forward to be going back to Shanghai, a tournament I have had success at in the past – the last time I was there was in 2016, thanks to the tournament for a wildcard, it's great to be able to continue my comeback and play more tennis in China.

In any sport winning gives you confidence, this year I've won a lot of matches, more than I ever have in my career to this point in a season.

It's not up to me to decide the punishment, but if you're taking performance enhancing drugs and you fail a drugs test, you have to get suspended, if you're taking a prescription drug and you're not using it for what that drug was meant for, then you don't need it, so you're just using it for the performance enhancing benefits that drug is giving you. And I don't think that that's right.