Paul and Musetti were handed cheques of €291,040 ($331,972) while quarter-finalists Ruud, Hurkacz, Draper and Zverev received €165,670 ($188,970).

Hurkacz lost in the first round in Paris and then won his opener at the Libema Open this week, but then also pulled out ahead of his second-round clash due to injury.

Top-seeded home favorite Alexander Zverev moved into the BOSS Open quarterfinals with a 6-2, 7-6 (7) win over Frenchman Corentin Moutet on Thursday in Stuttgart, Germany.