"Going into the World Cup, it'd be great if he did come back - even if it makes the competition for places even more difficult!" said the England captain.
"We all understood his frustration, but we'd all like him to come out of retirement, but it's down to him to make that decision. Only he can do that.
"But there's still Matty Upson, who everyone's speaking highly of and he's had a very good year, Joleon Lescott's done very well again and Gary Cahill has come into the squad.
"I spoke to Carra at the time, but it's his decision."