Roberto Martinez is confident teenage loanee Gerard Deulofeu will stay at Everton beyond this season.
Deulofeu, 19, scored a stunning equaliser against Premier League leaders Arsenal on Sunday, leading Martinez to explain he has plans to keep the Barcelona player long-term.
"He has come a long way," Martinez said in his post-match press conference.
"When he arrived in pre-season, I thought it would take him to around February to get used to his role as a team player and the physicality of the Premier League.
"He has surprised me and everyone that he is ready now and wants to help the team. He is incredibly arrogant in the right way, has belief in himself and his finish against Arsenal was exactly what he deserved."
Martinez added: "We have an agreement that it could be extended an extra year as long as the parent club do not need the player."