Manchester United must beware former winger Wilfried Zaha when they lock horns with Crystal Palace in the FA Cup final next month.
The 23-year-old, who was Sir Alex Ferguson’s final signing for the club, has spoken of his determination to haunt his former side, for whom he played just four times under David Moyes.
Here are three examples of ex-Red Devils who have scored against their former club throughout the years:
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It is no secret that Cristiano Ronaldo still harbours feelings for United despite swapping rainy Manchester for the sunny shores of Real Madrid nearly seven years ago.
However, that said, it did not stop the Portuguese winger knocking them out of the Champions League when the duo did battle in the round of 16 in 2013.
He rose majestically to head Madrid level after Danny Welbeck had put United in front at the Santiago Bernabeu, though found his route to goal regularly thwarted by a young but excellent David de Gea.
In the second leg, he was subdued by Phil Jones, but the controversial dismissal of Nani swung the tie in Jose Mourinho’s side’s favour.
Luka Modric cancelled out Sergio Ramos’ own-goal, before Ronaldo slid home the winner, much to his own embarrassment.
If there is one player to have angered United supporters like no other in recent years, then it's Argentinean forward Carlos Tevez.
The 32-year-old, who won both the Premier League and Champions League during his time under Ferguson’s tutelage, crossed the divide by signing for Manchester City in the summer of 2009.
United and City met in the Capital One Cup semi-finals, and Tevez scored twice to give Mark Hughes’ side the victory, despite Ryan Giggs’ early opener.
The forward, now with Boca Juniors, also scored in the return leg at Old Trafford, with his exquisite flick levelling the tie, but Wayne Rooney’s last-minute header ensured the Red Devils made the final at Wembley instead.
However, despite that pain, Tevez got his revenge by returning from a lengthy exile to help City win the league title in 2012.
United’s sensational Transfer Deadline Day capture of Radamel Falcao meant that Louis van Gaal allowed Danny Welbeck to join Arsene Wenger’s Arsenal.
The striker had hardly been prolific during his time at Old Trafford and, with Rooney, Falcao and Robin van Persie at his disposal, Van Gaal opted to let him join a close rival.
Welbeck drew a blank in his first appearance against his former club, with United surviving an Arsenal siege to win 2-1 courtesy of a late breakaway goal from Rooney.
However, he haunted them when the two teams clashed in the quarter-finals of the FA Cup last year, rounding De Gea to score the winner and send Arsenal through to the final.
He celebrated with particular vigour and was also on the scoresheet in Arsenal's 3-2 defeat to United at Old Trafford last month.
Who will win the FA Cup - Manchester United or Crystal Palace? Have your say in the comments.