If he's still playing like this, this time next year, we'd be mad to let him go. Feels like he's going to score whenever he's on the pitch at the moment.
Let's be honest, who could replace him for goals outside of someone like Messi. Still of the opinion that Kane is the one to go after when Sergio goes. Different type of striker and ankle injuries are a worry, can't argue with his goalscoring record though.
Ideally though get Sergio's contract extended for another year.