Carlos Alcaraz made it through to the quarter-finals at the Rolex Paris Masters without taking to the court after his scheduled opponent Matteo Berrettini withdrew from their third-round match.
The pair had been due to play on Thursday evening in the French capital but Berrettini suffered another injury setback, pulling out due to pain in his arm.
Alcaraz, who is chasing his fifth tour-level trophy of the season in the French capital, will face Taylor Fritz in the last eight at the ATP Masters 1000 event on Friday after he beat home favourite Arthur Fils 6-3 6-4.
Fritz must beat Alcaraz to qualify for the ATP Finals in Turin, with the last spot currently held by Spaniard Rafael Jodar, who lost in the second round earlier this week in Paris.
Alcaraz will be bidding to reach the semi-finals on the indoor hard courts of Paris for the first time in six appearances.
An official social media announcement from the tournament read: "Matteo Berrettini has to withdraw from the Rolex Paris Masters. Wishing you a speedy recovery Matteo. Carlos Alcaraz is qualified for the quarter-finals."
Berrettini posted a statement of his own in Italian on Instagram stories, which translated as: "Hi all, unfortunately the pain in my arm that I've had for a few days won't allow me to take the court tonight.
"In the next few days I will have all the necessary tests to better understand what this is. Thank you all for the support and affection you show me every day on and off the court. Mat."
Paul also keeps ATP Tour Finals hopes alive
American beat Frenchman Quentin Halys 7-6 (7-3) 6-4 to keep his ATP Finals hopes alive but will need to at least reach Sunday's final to stand a chance of being in the all-important top nine, with world No 2 Jannik Sinner out for the rest of the season.
Paul will next face compatriot , who fought back to defeat Arthur Rinderknech 3-6 6-4 7-6 (7-5) in a thrilling match.
Please use Chrome browser for a more accessible video player
France's hopes are on 's shoulders after he saw off Italy's Lorenzo Musetti 7-5 3-6 6-4 to set up a clash with qualifier , who beat Tomas Martin Etcheverry.
The other quarter-final sees Portugal's , who was a lucky loser, take on , with every match live on Sky Sports Tennis.
Stream tennis with no contract on NOW and the Sky Sports App. You can watch the ATP Paris Masters live on Sky Sports this week with the WTA Finals in Indian Wells starting on Sunday.