Last week saw Manchester United's unbeaten streak under Ole Gunnar Solskjær came to an end at the hands of Paris Saint-Germain in the first leg of the knockout rounds of the Champions League, and former United player Angel Di Maria particularly enjoyed his return to Old Trafford, creating two assists for both of PSG's goals.
Of course, Di Maria isn't the only example of a player who has tormented his past employers on the football pitch.
Here are seven other players who have come back to wreak havoc on their former clubs.
Manchester United 1-2 Real Madrid
5 March 2013
Following a great point earned at the Bernabeu in the first leg of the Champions League quarter final, Manchester United looked to settle the tie at Old Trafford.