Wan-Bissaka arrived at Old Trafford from South London last summer, after impressing in the 2018/19 season with Crystal Palace where he won the club’s player of the year award.
The Croydon-born star has impressed in his first season under Ole Gunnar Solskjaer, having already played 26 Premier League matches for the Red Devils.
Wan-Bissaka believes the duels against his compatriot in training is one of the reasons why he has improved a lot this season.
“He’s just so unpredictable. When I first joined United and came up against him in training, he was doing things that I just really didn’t expect,” the 22-year-old said in a QA on the club’s official website.
“I thought he’d go a certain way and he’d go the other way. Or I thought he was about to do one thing and he did another. So, he’s really tricky to play against.”
“I enjoy that though. It has been really good for my own development to test myself against him and the other attackers we have at the club.”
Rashford has been in good form for club and country before suffering a double stress fracture in his back against Wolverhampton Wanderers in January.
The 22-year-old has scored 19 goals and provided five assists in 31 appearances for United this season.