BERLIN, Feb 17 (Reuters) - Leaders Schalke 04 had to settle for a 2-2 draw at VfL Wolfsburg while Werder Bremen and Bayern Munich suffered further defeats on a day of missed opportunities in the Bundesliga on Saturday.
Schalke were 2-0 up by the 29th minute and on course for a seventh straight win -- a result that would have taken them seven points clear -- thanks to two goals from Kevin Kuranyi.
Diego Klimowicz pulled one back early in the second half, though, and Wolfsburg grabbed a point a minute from time when Marcelinho sent in a free kick that may just have brushed the head of Klimowicz on its way in at the far post.
A draw for Schalke was enough to take them five points ahead of VfB Stuttgart, who climbed to second thanks to a 4-0 win at Eintracht Frankfurt on Friday.
With 22 matches played, Schalke lead the standings on 49 points. VfB Stuttgart are second on 44, Werder third on 42 and Bayern fourth on 37.
Werder suffered a third straight loss when two goals from Rafael van der Vaart earned Hamburg SV a 2-0 victory in the big northern derby at the Weserstadion. The result was enough to take Hamburg off the bottom of the table.
Bayern's woes continued as they suffered a 1-0 defeat away to Alemannia Aachen in their final match before they travel to face Real Madrid in the Champions League on Tuesday. Alexander Klitzpera got the only goal for Aachen.
Bayern's second defeat in three games since the return of Ottmar Hitzfeld was yet another missed opportunity for the champions.
Aachen moved ahead with their first chance of the match in the 10th minute when the ball dropped at the feet of Klitzpera following a deep corner.
Oliver Kahn pulled off a good reflex save but Klitzpera was quick to the rebound, just getting enough contact on the ball to take it past Philipp Lahm on the line.
Bayern had almost complete command of the game thereafter but their finishing was dreadful.
Roy Makaay, who had gone close with a free kick early in the game, missed chance after chance in a one-sided match but the worst failure came from Roque Santa Cruz, who hesitated when presented with an open goal and allowed the defence to clear.
'We just played one good half,' Hitzfeld complained. 'In the first half we had seven or eight good chances but we weren't cool enough in front of goal.'