Former Manchester United manager Louis van Gaal’s spell at the club ended with a FA Cup win in 2016, but overall it was a spell which underwhelmed. Louis van Gaal’s managerial tactics may never have worked out, at times there was a lot to be desired. There was also a lot to like, with his willingness to bring through academy talent. The area Van Gaal was let down was in the transfer market, failing to land many top targets. Sadio Mane, Ngolo Kante and Riyad Mahrez were all players the manager wanted to sign. Another player who Van Gaal made an ambitious play for was then Liverpool winger Rahee…