United fans angry at Smalling
The Ivorian defender appeared to sustain a muscle injury just minutes into the second half, going down heavily after trying to challenge Eden Hazard.
Bailly was left on the ground clutching the back of his leg, and despite clambering to his feet was immediately replaced by Marcos Rojo.
Speaking after the game Jose Mourinho confirmed he had damaged his ligaments.
“Bailly is injured and I’m afraid it’s a bad one. It is in his knee - in the ligament area," the manager explained.