He's lucky he didn't get a kick from Eden Hazard.
The Mirror report that Mourinho said of the incident, where the ball boy was slow to return the ball for a Chelsea throw-in, 'I told him (the ball boy) not to do that because he runs the risk of one of my players to punch him or to lose his temper.'
'I went there to stop Azpilicueta because I know that Azpi is an emotional guy.
'I was afraid of Azpi… to push the kid or to create a situation so I went there just to stop my player, not anything else. And the kid knows because it was what I told him.'
Jump to 1.40 here to see him talk about it.