West Ham are bemused by Dimtri Payet's scathing interview with L'Equipe yesterday.

Sky Sports says Marseille midfielder Payet has told L'Equipe that one of the main reasons he left West Ham in January was because he was bored by their negative style of play and the team's poor form. He said his career risked regressing if he stayed at West Ham.

His comments have bemused a senior West Ham source who insists Payet told them he wanted to leave for personal reasons – there was no mention of him not liking the team's formation or wanting to leave for football reasons.

West Ham believe Payet's career was “resurrected" during his 18 months at West Ham. His weekly wage quadrupled to £120,000 a week, he regained his place in the France national team and he became one the standout performers at Euro 2016 in France.

A source at the club said he could not understand why Payet had decided to give the interview. He also said that manager Slaven Bilic would feel let down by Payet's comments.