The Belgium international, who joined the Blues in 2011, is expected to seal a reported £16m move to Bundesliga outfit Wolfsburg in the current transfer window.
Kevin De Bruyne is more than probably going to leave
And speaking at his media conference ahead of his side’s clash against Manchester United on Sunday, Mourinho confirmed that the 22-year-old is on the brink of an exit from Stamford Bridge.
“Kevin De Bruyne is more than probably going to leave,” Mourinho said. “He’s close.”
“We’ve also decided that Ryan Bertrand is the best thing is for him to go on loan until the end of the season,” he added.
“He’s a good player and he needs to play. For the moment, my options for left-back are Ashley Cole and Cesar Azpilicueta.
“So for Ryan, we felt that he needs to play because he is a good player. He’s going to Aston Villa until the end of the season.”
Villa manager Paul Lambert also expressed his delight at landing highly-rated Blues defender Bertrand.
“The way he plays the game and as a person, too, he’ll fit in here great and it will be good for him also to be playing games. He has real enthusiasm for the game and he’s looking forward to playing here.
“We’re grateful to Chelsea for allowing him to come here on loan and we know he’ll be really good to work with.”