We take a look at other instances in sport when ball boys and girls have become the centre of attention.
Wales v Ireland (2011)
After 59 minutes and Wales 13-9 behind, Jonathan Sexton sliced the ball out of play. The Irish pack took up their positions for the line-out before - against the rules - a ball-boy threw a different ball back to Welsh hooker Matthew Rees, who threw quickly to Mike Phillips. The big scrum-half then sprinted down the left touchline unopposed until Tommy Bowe's failed tackle on the line to touchdown. With Hook converting, Wales took the lead and eventually won 19-13.
C Palace v Chelsea (March)
Mourinho has previous with ball-boys, approaching one at Crystal Palace in stoppage time in last season's clash at Selhurst Park, complaining that they returned the ball too slowly.
''The kids were doing that all the time, so I went to stop Azpi (Cesar Azpilicueta) and I had the chance to get the kid, and the kid was cute," Mourinho said. "He came to me and I told him if he does this, 'one day somebody will punch you'."
Swansea v Chelsea (2013)
Eden Hazard was sent off and subsequently charged with violent conduct for kicking 17-year-old Swansea ball-boy Charlie Morgan. The Belgian lost patience when Morgan, the son of millionaire Swansea director Martin Morgan, refused to hand over the ball after it had gone out for a goal-kick. Morgan fell to the ground as Hazard attempted to get the ball from him, with Hazard then kicking it from under him. Hazard was banned for three matches.
Parramatta Eels v Canterbury Bulldogs - NRL (August 2014)
An NRL official left an 11-year-old ball-boy "crying himself to sleep at night" after telling him he cost his side the game. With a couple of minutes on the clock against Canterbury, a try from Eels half-back Chris Sandow was disallowed after the boy threw the ball straight to Eels winger Vai Toutai for a quick restart, instead of putting the ball on the sideline. Bulldogs won the match 18-16. Eels coach Brad Arthur described the comments as "an absolute disgrace" while the club's CEO Scott Seward defended the ball-boy. "We have something wrong in our game when a kid is crying himself to sleep," he said.