Van Gaal announced his retirement on Monday after winning seven league titles, the Champions League and the FA Cup across a 25-year managerial career with five different clubs - including United.
"Thanks for everything coach!!" Martial tweeted. "It was a honor to learn from you!"
Thanks for everything coach !! It was a honor to learn from you! pic.twitter.com/G1dYi1UJv0— Anthony Martial (@AnthonyMartial) March 11, 2019