Hamburg, Bayern all square

Bayern needed a 71st-minute equaliser from former Hamburg striker Ivica Olic to earn a point which left it two points behind leader Borussia Dortmund.

Jacopo Sala's first Bundesliga goal put Hamburg in front in the 23rd minute as it climbed further away from the drop zone.

Third-placed Schalke also wasted the chance to go level on points with Dortmund as it was held to a 1-1 draw at home by Mainz.

Mainz's new signing Mohamed Zidan marked his debut with a goal as he put the away side ahead in the 15th minute, but Chinedu Obasi's first goal for the Royal Blues earned them a draw.

And it proved a very good day for defending champion Dortmund with fourth-placed Borussia Monchengladbach also failing to win.

Its goalless draw at Wolfsburg left it one point behind Bayern and Schalke.

Stuttgart picked up its first point of 2012 as Martin Harnik's 89th-minute equaliser earned a 2-2 draw at Bayer Leverkusen.

The host twice threw away the lead in a match which saw both sides finish with 10 men.

Stefan Kiessling put Leverkusen ahead in the 11th minute, but Julian Schieber levelled 12 minutes later.

Leverkusen captain Simon Rolfes restored the host's lead just after the break from the penalty spot, but after it lost Michal Kadlec to a red card in the 63rd minute, Harnik grabbed a point for Stuttgart.

The visitor then had Cristian Molinaro dismissed in stoppage-time.

Second-bottom Augsburg came from behind to earn a 2-2 draw at Hoffenheim and boost its survival hopes.

Sascha Molders put the away side in front after half-an-hour, but Peniel Mlapa levelled before the break.

A Sejad Salihovic penalty then put Holger Stanislawski's side ahead early in the second half, but Augsburg hit back with Sebastian Langkamp levelling in the 72nd minute.

Mohamed Abdellaoui's 68th-minute goal earned Hannover a 1-0 win at Hertha Berlin, which had Sebastian Neumann sent off 15 minutes from time.