Wilhelmsson told the Swedish newspaper Sportbladet: “I would like to stay, but I don’t know what will happen.
“At the time being I only want to focus on doing well, there is not much more I can do.
“Also, I think I did will in Sunday’s derby. It was my first derby and it was very exciting for me.
“However, I cannot be totally happy because we failed to win the three points. Lazio played well but we should have finished one of the scoring chances we created.”
