Schalke, Hamburg draw in opener
The Dutch striker opened the scoring within two minutes, when Julian Draxler sent a perfect pass for him to surprise Rena Adler with a 20-meter (yard) shot.
The visitors were given some help in the 12th when Joel Matip was adjudged to have handled the ball from Marcell Jansen's cross, and Rafael van der Vaart duly converted from the penalty spot. Draxler had to go off in the 23rd with what appeared to be an injury to his left foot, allowing the highly rated Leon Goretzka to come on for his Bundesliga debut.
It got worse for Schalke a minute later, when Maximilian Beister crashed his header off the crossbar. The rebound bounced in front of the line, against unfortunate goalkeeper Timo Hildebrandt and into the net. Huntelaar equalized just before the break, however, meeting Christian Fuchs' cross to head unopposed past Adler. Beister should have scored his second only to be denied by Hildebrandt, but Lasse Sobiech put Hamburg 3-2 up with a header from a poorly defended corner in the 49th.
''We start by conceding three goals at home. That's way too many. We weren't in the game at all in the first half,'' Schalke coach Jens Keller said. ''But we did a lot right in the second half.''
Adler denied substitute Adam Szalai from close range in the 69th, but the Hungarian striker pounced to score in the 72nd, when the goalkeeper failed to hold on to Christian Clemens' long-range shot.
''We fell asleep for two of the goals. It shouldn't happen but it did, unfortunately,'' Van der Vaart said. ''Otherwise we played very well.''
Huntelaar became father to a baby girl on Tuesday, but was left dissatisfied despite his two goals.
''Normally we have to win at home. We're not happy about that,'' Huntelaar said.