Arsenal boss Mikel Arteta says Gabriel Martinelli needs to constantly upgrade his game.

Arteta is particularly excited by Martinelli's potential. The Brazilian, a £6m signing from Ituano FC in the summer, has scored 10 goals already this season, including two in his last three Premier League appearances. It is typical of Arteta, though, that he is still demanding more from him.

"He needs to digest a lot of things," he told Sky Sports, "The better you do, the more you have to start to digest what people think about you.

"He has to think 'now, the opponents know me better, the spaces are smaller, I am going to have more attention. I still want to do what I was doing three weeks ago or four weeks ago, but now it's not happening.' As a young player, you need to go through that. The mental side of it is a process."