Stefan Kiessling scored a hat-trick as Bayer Leverkusen defeated Stuttgart 4-0 to go three points clear at the top of the table.

Kiessling opened the scoring and also finished proceedings with his second and an 87th-minute penalty. Eren Derdiyok got the other.

Bayern Munich moved up to fourth with a 3-0 win away to Hannover.

Bayern's goals came from Thomas Muller, Ivica Olic and Mario Gomez to ease the pressure on under-fire coach Louis van Gaal.