Hungary remain the underdogs to qualify for Euro 2016 despite their first-leg play-off win, according to coach Bernd Storck.
The Hungarians have one foot on the plane to next year's tournament in France after debutant Laszlo Kleinheisler earned the visitors a 1-0 victory over Norway in Oslo on Thursday.
Storck, however, said via UEFA.com: "Norway remain favourites - they have excellent players.
"We need to play like we did today, or we will have problems [in Budapest on Sunday].
"We are in a good position [leading 1-0 after the first leg]. We did this for Hungarian football. We want to complete this job on Sunday - we need success."
The home team did dominate possession in the second but lacked cutting edge up front - Pal Helland almost rescuing a draw for Norway in the closing stages, only to see his effort hit the crossbar.
Norway boss Per-Mathias Hogmo remains upbeat about his team's chances heading into the return leg, though.
"We are at the halfway stage [of the tie]. We are already looking forward to the return in Hungary," said Hogmo.
"We played well, made a fantastic start and created two early chances. Unfortunately, we were not sharp in the box.
"I told the players: let this result motivate you for Sunday."
