And just last summer Aitor Karanka was happy for him to leave only to recall him into the team when Blues were short of energy in the middle of the park.

Indeed Kieftenbeld has worked his way back to being a regular starter alongside Ivan Sunjic. It is not clear whether Karanka now wants to keep him for the remainder of the season.

However, Blues have this week brought Rekeem Harper in on loan from West Bromwich Albion and Millwall will recognise the fact the Dutchman has only six months left on his existing contract.