Arthur Fils Retires with Back Problem in Basel Quarterfinal

The early withdrawal raises doubt over his Paris Masters entry and threatens his bid to secure a place at the ATP Finals.

Overview

Arthur Fils stopped his Swiss Indoors quarterfinal against Taylor Fritz while trailing 2-6, 0-2 after leaving the court for treatment and then retiring with a reported back complaint.
In a post-match press conference Fils said he felt a twinge in his leg at the start of the match and will return to Paris for medical exams before deciding whether to play again this season.
The episode is especially worrying because Fils missed much of 2025 with a stress fracture in his back, a history that raises concern about any new back issue.
Fils sits high in the ATP Finals race and needs a solid result in Paris to strengthen his position, so his fitness question could directly affect his chance to qualify for Turin.
Broadcasters and on-site reporters said Fils appeared fine before the match and his team seemed unaware of the problem, and his retirement adds to a string of late-season withdrawals that are reshaping draws and rankings.