Chelsea are wary filling their open loan spots this summer.
David Datro Fofana has today joined Union Berlin on a season-long loan,
The London Evening Standard says Fofana is the first of seven loan slots available to Chelsea under new FIFA regulations.
Management want to retain two loan spots until the end of August, in the event they need to cut squad numbers.
Tino Anjorin is set to be the next Blue to depart on-loan.