Danny Welbeck, a Manchester United fan, moved to rivals Arsenal last summer for £16m. The now 24-year-old wanted better first team opportunities as his new manager, Louis van Gaal, did not think he was a better option than Wayne Rooney, Robin van Persie Or Radamel Falcao.
Welbeck has 8 goals and 6 assists in all competitions this season, which isn't a spectacular return, but it's a better combined total than both Van Persie and Falcao.
Players do not often move between the two clubs, but when they do it always causes tension. However, Welbeck's move seemed to hurt United fans more than any other. A Manchester boy born and bred moving to Arsenal at an age when, with the right guidance, he'll be entering his prime years before long.
It seems fans are made to be reminded of Welbeck every time they visit Old Trafford, because the club have left up a poster of their homegrown ex-player.
As is the nature of a deadline day departure, Welbeck had already done all the player PR commitments like kit photo-shoots and such.
Welbeck isn't fit for the clash between Manchester United and Arsenal today, but his goal in the FA Cup quarter final and subsequent celebration was probably enough hurt for United fans for one season.