British number two Aljaz Bedene beat Spain's Marcel Granollers in straight sets to reach the second round of the Paris Masters.
Bedene, ranked 49th, won 7-5 7-6 (7-4) on Bercy's indoor courts to set up a last-32 match with American John Isner.
Slovenia-born Bedene came through two rounds of qualifying to reach the main draw at a Masters for the fourth time.
British number one Andy Murray has a bye and will play Fernando Verdasco or Borna Coric in round two on Wednesday.
World number one Novak Djokovic is the top seed in Paris, ahead of Murray and Swiss Roger Federer.