Manchester United manager Jose Mourinho ruled out signing a defender in January despite the departure of Eric Bailly for the Africa Cup of Nations.
"I'll wait for Bailly. I hope the three can control the situation in those eight matches," he told UK newspapers.
"I will try to rest one in every game. On Saturday I will rest one, against Hull another - and we'll try to make a rotation between these three.
United face a busy month, beginning with Saturday's clash at home to Reading in the FA Cup.