Robson has highlighted his experience as being a key attribute to his qualities, as well as insisting that he is a "very good player."
"Luke Shaw and Harry Maguire were as good as anybody in the European Championship in the summer," Robson told United's club website. "Luke was excellent last season and I think he's got a good understanding with Harry, so that looks strong.
"Raphael Varane looks as if he's going to be good competition at centre-back, we've got Victor Lindelof, Eric Bailly and Phil Jones – Phil's hardly played any football over the last couple of years but we all see, when he does play, he's a very good player.
"If Phil stays fit, then that's great experience and a very good player. So centre-half-wise we are looking strong, we've got a lot of competition there."
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