Jannik Sinner, the world's top-ranked tennis player, is under scrutiny after reportedly practicing in Doha, Qatar, despite a three-month doping ban that prohibits him from training and competing.

The tennis player initially said he hadn't done anything wrong but has now accepted a ban which expires in time for him to compete in the Italian and French Opens in May. But it has triggered a furious response from Australian Nick Kyrgios.

World number one Jannik Sinner has been banned from tennis for three months over two failed drugs tests last year. Sinner, who won the Australian Open in January, has reached a settlement with