Sunderland aimed a subtle dig at Leeds United after revealing a set of jackets their players - including loan star Joe Gelhardt - wore for their final home match of the season against Watford.
The red jackets commemorated the 50th anniversary of the Black Cats' win over the Whites in the 1973 F.A Cup Final next week, often remembered as one of the competition's biggest ever upsets.
Leeds, one of the most dominant teams in the early 70's, had won the competition the year previous with a 1-0 win over Arsenal, but a 32nd minute goal from Ian Porterfield meant Sunderland became the first Second Division side to lift the trophy in over 40 years.
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The jackets have a simple 'SAFC' emblem on it, with 'FA Cup Final, 50th Anniversary, 1973-2023' stitched in underneath as the Black Cats push for a playoff place in what has become an incredibly tight race towards the end of the season.
But eagle-eyed fans will notice that the only player shirt shown in the announcement was Gelhardt's, in what many believe might be a sly jab towards Leeds.
Sunderland fans were happy with the club's decision to release the jackets, but were even happier to notice the hidden joke.
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