As it happens his expected goal tally this season was 6. Shows he's at least getting the opportunities. Now he's got 3 (all excellent in different ways) he will hopefully be more composed in front of goal.
I'd be happy for Vipotnik to stay, but equally I would be happy for him to leave for £4 million. I'd consider letting him go for less if there are good alternatives available for a cut price, which is unlikely.
