The 26-years-old Austrian played in front of the fans in Belgrade during the first weekend of the Adria Tour. Thiem was successful at the tournament when he was undefeated and lifted the trophy in Belgrade. After the first weekend, he moved to France where he competes at the Ultimate Tennis Showdown (UTS). Following the cancellation of the Adria Tour, Thiem released a personal statement saying:

"I was shocked when I got the news from the Adria Tour. We played without an audience for weeks, so we have been more than happy about the fans at the event. We trusted the Serbian government's corona rules, but we have been too optimistic. Our behavior was a mistake, we acted too euphorically. I am extremely sorry. I've now got tested five times within the last ten days and the result was always negative. I wish everyone who is infected all the best and quick recovery," wrote Thiem in an Instagram post.

https://www.instagram.com/p/CB2bvHBlA_f/