Men's tennis player Tomas Berdych has issued a veiled criticism of Maria Sharapova, in the wake of her doping ban being reduced to 15 months.

Berdych has recently been treated for appendicitis and says every time he has to take something, he checks many, many times to make sure it's legal.

He says no matter who else is involved, you are the player and it is you who is out there playing and performing.

Sharapova's defence team successfully argued to the Court of Arbitration for Sport that tennis officials didn't communicate clearly that meldonium was to be put on the banned list this year.

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Berdych says he's already received the list for 2017 and it's easy to understand.