Kei Nishikori eased past Paolo Lorenzi of Italy 7-6 (3), 6-2 in the Swiss Indoors second round on Wednesday.
The third-seeded Japanese player did not take any of his six break point chances in an error-strewn first set, and then upped his play in the second against the 38th-ranked Lorenzi.
Earlier, seventh-seeded Richard Gasquet of France retired when trailing 6-2, 2-1 against Argentina's Guido Pella. Gasquet won the Antwerp title on Sunday.
Juan Martin del Potro was playing Robin Haase in a late match.