Reigning champions Bayer Leverkusen eased past struggling Holstein Kiel 2-0 with a goal and an assist from Amine Adli in the Bundesliga on Saturday to close the gap on leaders Bayern Munich to five points.

Bayer Leverkusen tightened their grip on second place in the Bundesliga as they cruised to a 2-0 victory at struggling Holstein Kiel on Saturday while Serhou Guirassy hit four goals as "euphoric" Borussia Dortmund routed Union Berlin 6-0.

LEVERKUSEN, Germany (Reuters) -Bundesliga leaders Bayern Munich had to survive some relentless pressing from champions Bayer Leverkusen to escape with a 0-0 draw in their top-of-the-table clash on Saturday and maintain their eight-point advantage at the summit.