The new United midfielder insists he is determined to repay the faith that Dutch manager showed by splashing a British record fee of £59.7 million for his services.
Van Gaal captured Di Maria from European Champions Real Madrid, and the new number seven is already proving his class. On his home debut against QPR on Sunday the talismanic Argentinian scored one and assisted another leading to him being named man of the match.
Di Maria spoke to Perform about his new boss and how he will give his all for his new club:
"Van Gaal was really important for me, in order to come here.
"[He] was one of the first [people] who spoke about bringing me here. The coach always has the last word about the players he wants.
"I am really grateful to him because, thanks [to] him, I am now playing for United.
"I keep trying to improve every day and for that reason I wanted to come here to United. I needed to change my life. I will try my best to play the right way. I will try my best every match and show my arrival at Old Trafford was worthy."
United haven't started the new Premier League campaign the way they finished pre-season; after winning every pre-season match the Red Devils went on to have a poor league start losing one, drawing two and winning just one.
But Di Maria says the players no they haven't started well and adds that sometimes those things just happen in football:
"Manchester United are trying to grow.
"We already know we didn't start the Premier [League] in the right way [but] those things always happen in football."
The 26-year-old's next United outing will likely come away at Leicester City this Sunday. United supporters will be hoping that their key man continues his fine form and inspires them to victory over the foxes, who have a good start to life back in the top tier.