Thiem, seeded third, failed to serve out the opening set at 5-4 but won the final three points in the tiebreak, before taking control of the match in the second set.

WATCH TENNIS ON EUROSPORT AND EUROSPORT PLAYER

The 24-year-old Austrian finished with 19 aces and converted three break points to collect his 36th match win of the season.
ATP Halle
Nadal returns to number one before Wimbledon
24/06/2018 AT 13:36
Thiem is set to make his fifth consecutive appearance at Wimbledon next month but has never got beyond the fourth round.
However, he will be looking to improve that record on the back of his maiden Grand Slam final appearance at Roland Garros.
Thiem will next face Japan's Yuichi Sugita, who beat German wildcard Maximilian Marterer 6-4 5-7 6-3.
ATP Halle
Clinical Federer beats Kudla to set up Coric final in Halle
23/06/2018 AT 13:40
ATP Halle
Federer saves two match points to beat Paire in Halle
21/06/2018 AT 16:12