Dominic Thiem beat youngster Jannik Sinner in straight sets to win the Bett1 Aces final on Sunday. The Austrian star beat his 18-year-old opponent 6-4, 6-2 - Thiem making five aces in the opening set. Sinner had a promising run in the event, beating Roberto Bautista-Agut and Karen Kachanov on his way to the final. Errors began to filter into Sinner's game after the first set, with world number three Thiem too much to handle.