Reece Oxford has said that he is "angry" at West Ham United and has vowed to leave the club unless he is handed first-team opportunities in the coming weeks.
Oxford made his first-team debut for West Ham at the age of 16, before going on to appear on 12 occasions for the Hammers during the 2015-16 campaign.
The 19-year-old's career with the London club has stalled since then, however, and he spent time on loan at Borussia Monchengladbach last season before returning to the London Stadium during the summer.
Oxford has not made a single first-team appearance for West Ham this season though, and he has said he will "move on" unless the situation changes.
"I sit on the settee and feel angry," Oxford told The Times. "I don't want to be there - I want to be on the pitch, playing against these big teams. I've just got to find my way.
"Things can change round at West Ham in a week. I think (Manuel) Pellegrini believes if you are training hard you can get in, and I look at Grady [Diangana]. He's kicking on now and I want that to be me.
"But if I am not playing, I hope West Ham would look kindly on my situation and let me go, because there is no point being 20 and not around the first team. Hopefully everyone wants me to fulfil the potential they have seen.
"The club has done a lot for me. Given me my debut, made me the player I am. I could never talk down the club but right now I need to be playing and if West Ham are not playing me, I've got to move on and part ways."
Gladbach are reportedly preparing to return with a bid for Oxford during the January transfer window.