The Austrian struck in victory over Fulham.
Arnautovic said: "We played brilliantly. I'm so happy that we have played so well in the second half of the season.
"We have been great and we hope that we can continue like this because we have played good football.
"I love it when the fans chant my name. It's always nice when they are behind you and you can hear them. It was unbelievable the way so many stayed behind at the end. It's lovely to play here."
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