Manchester United boss Sir Alex Ferguson is delighted with the progress of twins Rafael and Fabio da Silva this season.

Ferguson rates the pair extremely highly. And though they have one of the best attacking full-backs in the world to learn from in Patrice Evra, given their nationality, the United boss does not see much point in pushing it.

"They are Brazilians," he said.

"We have always thought highly of them both. They are equally good.

"You can't split them, and that goes for their looks as well because it is impossible to tell them apart.

"If they were playing a match and they didn't have numbers on their shirts and shorts, you wouldn't know which one was which."