It's a disaster when this happens during a game, but for it to happen twice? 

Football fans were left amazed when Braunschweig goalkeeper Daniel Davari inadvertently gave Gladbach a first-half lead when an own goal happened.  In the second half, Ter Stegen returned the compliment when he failed to control a back pass and instead knocked the ball into the net shortly after the break.

Werder Bremen eased their relegation fears and left arch-rivals Hamburg SV in deep trouble after a 1-0 win in the 100th Bundesliga meeting between the old rivals, northern Germany's two biggest clubs.

Borussia Dortmund moved into second place with a 3-0 win over Nuremberg, Robert Lewandowski getting among the scorers to take his tally for the season to 15, and overtook Bayer Leverkusen who lost 1-0 at home to Mainz 05.

Dortmund have 45 points, 17 behind leaders Bayern Munich who were at home to Schalke 04 in the evening game (1730 GMT), while Leverkusen have 43.