Bare minimum would be to get a consistent run of 10-15 games, hasn't played more than 10 full games per season under LVG. I personally don't see him at No.10, considering the number of players we have there; Ibra, Rooney(highly doubt that Mourinho will play him further back than No.10), Mata, Herrera, Pereira(he's better than Adnan through the middle). On the evidence of the first season, I thought he would become a world class Rw, he was good at getting past people, had a decent end product(needed improvement), and could also use his right foot. Right now it's easier for him to play at Rw, Lingard is genuinely the only player that can play there.