Substitute Mario Goetze led Bundesliga leaders Bayern Munich on a second-half four-goal rampage after midtable Mainz 05 had the temerity to take a halftime lead at the Allianz Arena on Saturday.
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Goetze set up the first three Bayern goals in the 4-1 win after Shawn Parker had pounced on a Jerome Boateng error to put the visitors ahead in the 44th minute, briefly threatening to end Bayern's 33-match unbeaten league run.
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An early penalty from Marco Reus agave Borussia Dortmund a 1-0 win over Hanover 96 while Roman Neustaedter scored in stoppage time as Schalke 04 twice came from behind to win 3-2 at Eintracht Braunschweig.
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Josip Drmic also scored late in the game to give Nuremberg a 1-1 draw at Eintracht Frankfurt where Vaclav Kadlec opened the scoring. Nuremberg remained without a league win this season as did Freiburg, who held Werder Bremen 0-0.
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Bayern, with 23 points from nine games, quickly overhauled Leverkusen (22 points), who had briefly gone top on Friday with a 2-1 win at Hoffenheim, courtesy of a Stefan Kiessling header which entered the net through a hole in the side rather than the goal.
Bayern Munich did very well in that very game. They've got lots of INCREDIBLE players!