HAMBURG, Germany — Top-seeded Dominic Thiem was upset by Andrey Rublev of Russia in the quarterfinals of the Hamburg European Open, losing 7-6 (3), 7-6 (5) on Friday.
Rublev, who beat a top-10 player for only the second time, recovered from two breaks in the first set to eliminate the two-time French Open finalist.
The 78th-ranked Rublev will next face Pablo Carreno Busta after the Spaniard beat third-seeded Fabio Fognini 3-6, 6-2, 7-6 (4).
Second-seeded Alexander Zverev is safely through after the German survived a scare before rallying to beat Filip Krajinovic 2-6, 7-5, 6-2.
Krajinovic was a set and a break up and serving for the match before Zverev recovered, breaking back with a backhand down the line, much to the delight of his home crowd.
Zverev never looked back and went on to win 91% of his first-serve points in the decider to set up a semifinal against defending champion Nikoloz Basilashvili, after the fourth-seeded Georgian beat Jeremy Chardy 6-2, 6-3.
Zverev is playing at his home ATP 500 tournament for the first time since 2016, when he exited in the first round.