Former Manchester United captain Bryan Robson is convinced Alexis Sanchez can find his best form.

The Chile international joined United from Arsenal in January and has only scored three goals in his first 21 appearances.

Robson said, after Manchester was named the Greatest Sporting City 2018: "Sanchez is a top-class player. But we haven't seen the best of him at Manchester United so far.

"But I'm sure he'll get to the top of his game. This summer was the first summer he's had off for several years, and that should do him good.

"Sometimes, though, when you have a free summer and a fair few weeks off, it can take a little bit more time to come back really sharp and to get into the season.

"These first few games of the season are maybe just what he needs to sharpen him up and then hopefully we'll see the best of him for the rest of the season."