The Manchester United defender has discussed the differing styles of both managers.
The Manchester United defender was discussing the difference in style between both coaches and admits the Dutchman is 'completely different' from his predecessor.
Indeed, Van Gaal is, in the Brazilian's words, a 'strong coach' that likes to see the players 'training hard.'
If the United squad follow their new manager's lead, the 24-year-old says, the titles he has won in the past are 'proof' that it is the right way to go.
"It's completely different, different football philosophies, this is the biggest difference between them [Moyes and Van Gaal]. But it is normal," Rafael told Perform.
"Van Gaal is a strong coach. He admires the right things, he asks everybody to be on time for the activities, we can’t be late, he likes to see us training hard.
"So, he has some differences, especially the philosophy and we need to be adapted to this. However, it’s something right and the proof is the titles that he won."