The Scot officially took over the reins at Old Trafford from Sir Alex Ferguson on 1 July, with the club’s first pre-season game on 13 July.
And following a summer of rest, Rafael cannot wait to get going again and is prepared to put in plenty of effort to impress as United embark on tour of Asia.
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"The pre-season tours are a big part of preparation work for the new season. If you play well, you can put a thought in the manager’s mind and maybe change his mind if you perhaps weren’t in his plans for the first few games.
"Not only are we able to put in some hard work on the training pitch when we're on tour, it's good to see different cultures and different things. It's great that we're able to visit countries across the world because we have so many fans.
The 22-year-old established himself as the club’s first-choice right-back last season and is looking forward to meeting the Red Devils supporters from around the world.
“We are a big club and we have supporters everywhere and it’s good for us to go on tour and see them. They give us so much support and it's great that we're able to meet some of them, especially those who aren't able to get to Old Trafford.
"The tour is a great experience for the young players and the older players like Ryan Giggs and Rio Ferdinand are always really encouraging when we're away and help us a lot. I'm sure this year's tour will be another great trip and it's one we're all looking forward to."