Mason Mount will'struggle' this season at Manchester United, according to former Arsenal defender William Gallas.

Andre Onana, a summer signing for Manchester United, was also mentioned by Gallas as being "fine."

This summer, Mount and Onana respectively left Inter Milan and Chelsea to join Man United.

They began Monday's 1-0 victory for Erik ten Hag's team over Wolves in Manchester United's Premier League debut.

And Gallas thinks Mount will need some time to get used to Manchester United's playing style.

“It is not easy for Chelsea fans to see Mason Mount wearing the Manchester United shirt, but he will have to adapt to the United system, and that won’t be easy for him,” Gallas told Genting Casino.

“I think it will be a difficult season for him.”

Gallas added: “Erik ten Hag signed Onana because he wants his goalkeeper to play almost like the last defender. He wants them to be calm with the ball at their feet and to play like a defender.

“I saw the quality he has already and he will have to adapt to the new system. I think he will be fine though.”