Roger Federerbeat Jeremy Chardy 7-6 (5), 6-7 (5), 6-4 to advance to the third round of the Paris Masters, while Andy Murray defeated Julien Benneteau 6-3, 6-4.
Chardy saved two match points at 5-4 in the second set before forcing a decider with a stunning crosscourt forehand winner.
Federer arrived in Paris undefeated in his past 12 matches on the back of consecutive titles in Shanghai and Basel, trailing top-ranked Novak Djokovic by 490 points.
With 2,500 points up for grabs between Paris and at the ATP Finals in London, Federer is looking to clinch the year-end top spot for a record-equaling sixth time. He will also have a chance to earn points with Switzerland in the Davis Cup final against France next month.
Stan Wawrinka scored a 6-4, 7-6 (6) win over Dominic Thiem.