The United forward appeared to knock a mobile phone from the hand of a spectator while on his way back to the dressing room at full-time.
On his way off the pitch, Ronaldo looked to be limping and was clearly disappointed with the result, as his emotions seemingly got the better of him following a tough afternoon for United.
Our no.7 took to Instagram on Saturday evening to apologise for his actions with a post that read:
“It’s never easy to deal with emotions in difficult moments such as the one we are facing.