Klaas-Jan Huntelaar (second from left) scored twice during the first half for Schalke.
Juergen Schwarz/Getty Images

BERLIN (AP) -- Klaas-Jun Huntelaar scored twice as Schalke came from behind to salvage a 3-3 draw against visiting Hamburger SV in the Bundesliga on Sunday.

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-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 a left ankle injury, 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.''

Earlier, Japan striker Shinji Okazaki scored on his Bundesliga debut for Mainz in a 3-2 win over his former side Stuttgart.

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.