The former Bournemouth and Wolverhampton Wanderers boss was swiftly appointed, little more than 24 hours after Rosenior left the Ligue 1 side for the Blues.

O'Neil, who has been out of work since leaving Wolves in December 2024, takes over with Strasbourg occupying seventh place in the French top flight.

The 42-year-old will oversee training for the first time with his new club on Thursday, before his opening match against Avranches in the Coupe de France two days later.

"I'm excited to get started and proud to be part of this fantastic club," O'Neil said. 

"It's a club with a unique history, incredible passion, resilience, and, of course, loyal supporters who want to see this team play well and be successful.

"We have an exciting group of players and clear, ambitious objectives for the season. My focus is on working hard with the squad to give everything for the club's success."

Strasbourg president Marc Keller added: "I am very happy to welcome Gary O'Neil to Racing. He is a demanding and respected coach, with a modern approach to football that fits perfectly with our sporting project."