Former Crystal Palace winger Bostock told the Daily Mail: "He can play left or right midfield but for me he is a No 10,' said Bostock. 'He has dribbling skills, he goes past players as if they are not there with a shrug or a dip of the shoulder. I have been playing against him since he was 12 or 13. I was at Palace. He was at Arsenal.
"Arsenal are a technical team, they are suited to his style of play. He can do a lot of damage on the ball and he is a typical Arsenal player, almost continental in his approach, and that is what Wenger will like in him so much. He is adaptable.
"He has always been small, but he is nimble and can go past players easily. He is tough, too, which surprises people."