After weeks of speculation, United finally confirmed what everybody had been expecting - that van Gaal would take over from David Moyes as manager after he completes his duties with the Dutch national team at this summer's World Cup. Moyes failed to continue the work of Sir Alex Ferguson at Old Trafford, and now van Gaal is charged with the task of overhauling a United squad which failed miserably this season.
With a rumoured €100m transfer budget available to the Dutchman, this summer promises to be a busy one for the Red Devils, and a number of players have already been linked with moves to the club. Many areas of the team need improving, but no position is quite as pressing as central midfield.
Michael Carrick endured a below-par season, whilst £27.5m signing Marouane Fellaini failed to live up to his price tag after his summer move from Everton. United suffered from a lack of creativity through the middle of the park. It's therefore unsurprising to see the club linked with a move to sign Roma's Strootman, who was a target for the club before the 24-year-old left PSV Eindhoven a year ago.
Strootman has been a key part of van Gaal's Holland side since he took the reins after Euro 2012, and the 62-year-old has suggested that the midfielder is on his summer wishlist.
"Success at United doesn't depend on money, but about which players we bring in," he said. "I gave my wishlist to the club. Is Kevin Strootman on it? A question for you, a fact for me."
Strootman would be the ideal signing for United, but there's a caveat - he sustained a torn anterior cruciate ligament injury in March, which has ruled him out of the World Cup this summer, and could take until October to fully recover from.
The Italian club would be looking for a fee in the region of £30m for their star midfielder, and having suffered such a big injury, there have to be concerns over his ability after his recovery. The next midfield signing is critical for United after the failure of Fellaini, and the questions surrounding Strootman's future could make it a huge risk.