Ben Shelton was on the end of a superb fightback from Daniel Altmaier, who won 4-6 7-6 (7-4) 6-4 in Hamburg.
Daniil Medvedev will face Felix Auger-Aliassime in the semi-finals of the Dubai Tennis Championships after he defeated Jenson Brooksby.
It took Carlos Alcaraz three sets to down Casper Ruud to reach the final in Japan, where he will face American Taylor Fritz.
Carlos Alcaraz's winning run extended to 20 Tour-level matches after downing qualifier Oliver Tarvet to reach the third round at Wimbledon.
No matches available.
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