No. 6 seed Alex de Minaur began defense of his Rothesay International title with a 6-3, 6-3 win over Cristian Garin in a first-round match on Monday in Eastbourne, England.
The 23-year-old Australian broke Garin four times en route to dispatching the Chilean in 83 minutes.
Other seeded players were not as fortunate, however. Maxime Cressy cruised to a 6-3, 6-1 win over fifth-seeded Reilly Opelka, and Kazakhstan's Alexander Bublik rallied to a 5-7, 7-6 (4), 6-0 victory over seventh-seeded Frances Tiafoe.
No. 5 seed Roberto Bautista Agut of Spain posted a 6-4, 7-6 (4) victory of Taro Daniel of Japan in a first-round match in Spain.
Also on Monday, Ilya Ivashka of Belarus cruised to a 6-4, 6-1 win over Emil Ruusuvuori of Finland to set up a second-round meeting against second-seeded Stefanos Tsitsipas of Greece.
Frenchman Benjamin Bonzi advanced to set up a match versus third-seeded Denis Shapovalov of Canada after Chilean qualifier Alejandro Tabilo retired while trailing 6-3, 4-2.
--Field Level Media