Hamburg came from two goals down to hold Bayern Munich to a 2-2 draw and spoil Juergen Klinsmann's league debut in charge of the Bundesliga champions on Friday.
Bayern had got off to a flying start in Munich's Allianz Arena with goals from Bastian Schweinsteiger and Lukas Podolski from the penalty spot.
But Hamburg came back well to earn a deserved point in an entertaining game thanks to a Paolo Guerrero header and a Piotr Trochowski penalty.
Although there were plus points in the performance for Klinsmann, injury-hit Bayern were often second best to a bright Hamburg side who under new coach Martin Jol sought to go forward from the start.
The visitors began strongly and the lively Trochowski fired an 11th-minute cross-shot from the left which struck the post with Michael Rensing in goal beaten.
But Hamburg were caught napping a minute later from a throw-in by Philipp Lahm who sent Ze Roberto down the left. The Brazilian cut the ball back and Schweinsteiger raced in to drive the ball into the net.
Four minutes later Bayern were awarded a penalty when Dutch defender Joris Mathijsen had his arms around Schweinsteiger, and Podolski sent goalkeeper Frank Rost the wrong way from the spot kick.
It was the perfect begin for Bayern who were missing several injured first-choice players including France midfielder Franck Ribery, Italy striker Luca Toni, Turkey midfielder Haltin Altintop and Argentina defender Martin Demechelis.
However the shirt-sleeved Klinsmann was often on the touchline with instructions as Hamburg continued to use the ball well in midfield and find space to threaten an uncertain Bayern defence.
New captain David Jarolim and Trochowski, a former Bayern player, more than adequately filled the gap created by the departure of Rafael van der Vaart to Real Madrid, with Dutch international Nigel de Jong a firm anchor in defensive midfield.
In the 25th minute, Hamburg were back in the game when Trochowski whipped in a cross from the right and former Bayern striker Paolo Guerrero was left unmarked to head the ball firmly down into the net.
Podolski had a glorious opportunity to put Bayern further ahead but blasted the ball over the bar four minutes after the break, whiler Hamburg came close a minute late when Ivica Olic struck the post.
However the equalizer wasn't long coming. Referee Thorsten Kinhoefer again pointed to the spot for a holding offence when Bayern right-back Christian Lell was adjudged to have tugged at Olic, and Trochowski stepped up to coolly convert from the spot for the 57th-minute equalizer.