From Iga Swiatek and Jannik Sinner to Maria Sharapova, we look at seven Grand Slam champions who failed drugs tests.

Iga Swiatekwas handed a one-month suspension - though one former No 1 calls for a "life ban" for anyone who fails a drug test ...

Iga Swiatek 's new coach, Wim Fissette, revealed that he knew about her doping case before making a decision to join her team ...

In tennis news, Jannik Sinner gets good news, Iga Swiatek gets some reality, and Nick Kyrgios tweets a warning.