British men's number one Cameron Norrie stayed in the hunt for an ATP Finals spot with a straight-set victory over American Reilly Opelka in Paris.
Norrie won 6-3 6-4 to reach the third round of the Masters event, which offers significant points in the race to reach the year-end finals.
The 26-year-old Briton will qualify if he manages to come through a strong field to triumph in the French capital.
Norrie will face Taylor Fritz, who beat Andrey Rublev, in the last 16.
American Fritz, 24, earned his third straight victory against a top-10 opponent with a 7-5 7-6 (7-2) win against the Russian fifth seed Rublev.