Pablo Carreno Busta looks on during a practice session in Hamburg. PCB would later win his opener in straight sets over Carlos Taberner.
American Jack Sock reacts after clinching a first-set tiebreaker over Kevin Anderson in the pair's Newport quarterfinal.
A closeup look at Hamburg European Open top seed Stefanos Tsitsipas on the practice court.
A driverless Yurikamome line train passes by Ariake Tennis Park, the tennis venue for the upcoming Tokyo Olympics.
Tsitsipas will meet sixth seed Filip Krajinovic in Friday's Hamburg quarterfinals.