Manchester United defender Chris Smalling has reportedly grown frustrated with the club for not allowing him to leave.
The central defender spent last season on loan at Serie A giants AS Roma, who are believed to be keen on a permanent deal.
It is believed the 30-year-old is now training on his own at Carrington in a bid to keep fit after returning from his loan spell.
According to Daily Mail, Smalling is not too pleased with the Red Devils who are demanding £18million after rejecting Roma's previous offer.
The report adds that Smalling has been in regular contact with manager Ole Gunnar Solskjaer but is not happy that talks have not progressed.
Fellow United defender Marcos Rojo is reportedly in the same boat as Smalling after training on his own as he seeks an exit.