Top 5 players who struggled after leaving Manchester United

#3 Danny Welbeck

Welbeck will find it difficult to break into Wenger's first team this season

This player might find himself unlucky to be included in this list but Welbeck hasn't fulfilled his potential enough since arriving at Arsenal. He was a popular figure at Old Trafford with the fans, a hard-working yet talented attacker who clearly loved the club, but Louis van Gaal didn't fancy the player and let him leave for their rivals.

The Dutchman cited Welbeck's poor goals record: while he never scored as many goals as Robin van Persie, his game wasn't defined by his goal scoring, and was more about his tireless running and athleticism that were so effective for his teammates.

His old club could certainly have used him during their troubling campaigns under van Gaal and initially Welbeck started well in London, scoring the winning goal in 2015 that knocked out Manchester United from the FA Cup (Arsenal would go on to lift the trophy that year) and completing his first professional hat-trick in the UEFA Champions League group stage against Galatasaray.

It was a promising debut season for the attacker but since then, Welbeck has only scored 14 times in all competitions in the last 3 seasons. He's been incredibly unfortunate with injuries, missing large portions of each year and has struggled to find proper rhythm as a result. To make matters worse, he had to watch as his side lift the FA Cup twice without him.

What's also worrisome for Welbeck is Arsenal's signings during the January transfer window. Pierre-Emerick Aubameyang and Henrikh Mkhitaryan arrived for big money, both have started well for the club, and Welbeck's path to the first team seems more closed than ever.

Arsene Wenger seems to have him as 6th choice for a starting attacking position and with the World Cup getting closer, Welbeck's chances of making the tournament in Russia look slim.