The Court of Arbitration for Sport (CAS) has reported that Mikael Ymer lied about the reasons behind his missed drug tests which led to his ban.

The Swedish player was hit with an 18-month ban in July of this year after he missed three out-of-competition doping tests in a 12-month period. Following this, Ymer announced his retirement from the sport at just 24 years old.

"Hey guys I've decided to retire from professional Tennis. Thank you all for the amazing memories! What a ride it's been! I wish all my old colleagues well going forward in competition," he wrote on X, formerly known as Twitter.

CAS reported in their judgment, which has now been made public, that Ymer lied to them about his reasons for missing the doping tests.

One of the reasons he gave was that he slept in after staying up all night to care for his sick brother. However, it was revealed that his brother, junior tennis player Elias Ymer, was actually playing a tournament in Finland at the time.

"'The ITF (International Tennis Federation) has presented evidence that the player's younger brother was at a tournament in Finland at the time, which means that the player's description cannot be true. The player then withdrew his objection.

"On another occasion, Ymer had said that he stayed in Spain after being knocked out of the Barcelona Open. In fact, he had traveled to Ethiopia," CAS wrote.

Tennis fans have taken to social media to react to the report, with many expressing their shock and disbelief at the revelation.

"Honestly how dumb you have to be to lie about whereabouts of your brother who was at a tennis tournament, to International Tennis Federation.

I mean, if there's one thing ITF will probably be able to verify, it's participation of a player in a tennis tournament," wrote one Reddit user.

"And once again, he has shot another bullet through his foot.

Mikael was extremely promising during his early days, such a shame he threw it all away because he was too lazy to take a p*ss and detect it," added another.