Jannik Sinner explains what went wrong for him in Doha after shock loss to Jakub Mensik

Jannik Sinner has reflected on his surprise exit from the Qatar Open in Doha, where he was knocked out by Jakub Mensik. Mensik won their quarterfinal match 7-6(7-3), 2-6, 6-3, ending a run that had seen Sinner get past Tomas Machac and Alexei Popyrin in the earlier rounds.