Not only did Di Maria's Old Trafford switch bring in £59.7m for Real Madrid, Los Blancos will rake in another £4m if the Argentine is named the world's best player

Real Madrid's decision to sell Argentine ace Angel Di Maria to Manchester United looks to be one to reap significant profit.

The 26-year-old former Benfica star completed his whopping £59.7m Old Trafford switch last month in the 2014 summer transfer window for a record-breaking English Premier League transfer fee.

And now, as reported by Jason Burt of the Telegraph, in a serious of unusual add-ons in the player's contract with the Red Devils, Los Blancos will pocket an extra £4m if Di Maria wins the coveted Ballon d'Or during his time at the Theatre of Dreams.

According to the report, this extra clause was suggested by the Liga BBVA giants' negotiators and the player's representatives during talks with the 20-time English Premier League champions, a stipulation Louis Van Gaal's side were “comfortable” agreeing to.

This arrangement may further vindicate Les Merengues president Florentino Pérez's decision to cash in on the Albiceleste winger, a move that has sparked a bitter war-of-words between the two.

Real Madrid will profit £4m if Angel Di Maria wins a Ballon d'Or whilst at Man United

This Ballon d'Or add-on is part of a serious of unusual clauses in the Argentine's record-breaking £59.7m EPL transfer to the Red Devils

The latest spat between “El Fideo” and Pérez has seen the Manchester United attacker's agent Eugenio López claim the Argentine would have remained at Santiago Bernabeu for far less than his current salary at Manchester United, pointing towards mistreatment on the 10-time Champions League winners' part.

"Di María signed for Manchester United with a net salary of €8 million. He would have stayed at Real for much less," López stated.

“Ángel wanted to stay. The difference was €1 million per year. Real began the negotiations but did not want them to advance"

"When he joined Real he accepted a lower salary than the one agreed. Then he was promised an improved contract after six months, but they took two years to do it."