<p>Niko Kovac admitted his future as Bayern Munich coach hung in the balance Saturday after their 5-1 thrashing at Eintracht Frankfurt -- the club's heaviest Bundesliga defeat for 10 years.</p>.<p>Bayern are now four points behind leaders Moenchengladbach after their biggest league loss since a humiliating 5-1 drubbing in April 2009 at Wolfsburg.</p>.<p>That defeat a decade ago eventually cost Jurgen Klinsmann his job as Bayern boss and Kovac could face a similar fate as Frankfurt shredded 10-man Bayern after defender Jerome Boateng was sent off after nine minutes.</p>.<p>Kovac has been in charge since June 2018, winning the league and cup double last season, but could only offer a glum "I don't know" when asked about his future.</p>.<p>"After the red card, everything went out the window," a bitterly disappointed Kovac told Sky.</p>.<p>"Nevertheless, that shouldn't have happened to us and it's not what we expect from ourselves.</p>.<p>"We made too many mistakes."</p>.<p>Bayern had Boateng sent off for a straight red card for a foul as the last man, before goals by Filip Kostic, Djibril Sow, David Abraham and Martin Hinteregger put Frankfurt 4-1 up with an hour played.</p>.<p>Robert Lewandowski scored for Bayern in the first half, extending his league record of scoring in the first 10 games this season.</p>.<p>However, such was Frankfurt's dominance that head coach Adi Huetter brought on a third striker in Andre Silva for defensive midfielder Gelson Fernandes with 10 minutes left.</p>.<p>The bold move paid off as Goncalo Paciencia added their fifth goal five minutes from time.</p>.<p>"It's not a huge wonder (that this happened)," fumed Bayern captain Manuel Neuer. "Things had already got off to a (bad) start."</p>.<p>"That (the red card) didn't make it any easier, of course, but still you can't concede five. We're not consistent in our defence."</p>
<p>Niko Kovac admitted his future as Bayern Munich coach hung in the balance Saturday after their 5-1 thrashing at Eintracht Frankfurt -- the club's heaviest Bundesliga defeat for 10 years.</p>.<p>Bayern are now four points behind leaders Moenchengladbach after their biggest league loss since a humiliating 5-1 drubbing in April 2009 at Wolfsburg.</p>.<p>That defeat a decade ago eventually cost Jurgen Klinsmann his job as Bayern boss and Kovac could face a similar fate as Frankfurt shredded 10-man Bayern after defender Jerome Boateng was sent off after nine minutes.</p>.<p>Kovac has been in charge since June 2018, winning the league and cup double last season, but could only offer a glum "I don't know" when asked about his future.</p>.<p>"After the red card, everything went out the window," a bitterly disappointed Kovac told Sky.</p>.<p>"Nevertheless, that shouldn't have happened to us and it's not what we expect from ourselves.</p>.<p>"We made too many mistakes."</p>.<p>Bayern had Boateng sent off for a straight red card for a foul as the last man, before goals by Filip Kostic, Djibril Sow, David Abraham and Martin Hinteregger put Frankfurt 4-1 up with an hour played.</p>.<p>Robert Lewandowski scored for Bayern in the first half, extending his league record of scoring in the first 10 games this season.</p>.<p>However, such was Frankfurt's dominance that head coach Adi Huetter brought on a third striker in Andre Silva for defensive midfielder Gelson Fernandes with 10 minutes left.</p>.<p>The bold move paid off as Goncalo Paciencia added their fifth goal five minutes from time.</p>.<p>"It's not a huge wonder (that this happened)," fumed Bayern captain Manuel Neuer. "Things had already got off to a (bad) start."</p>.<p>"That (the red card) didn't make it any easier, of course, but still you can't concede five. We're not consistent in our defence."</p>