Swiss ice hockey league leaders, Davos, remain top of the standings after drawing 2-2 away to Rapperswil.
Davos put up a poor showing against the home side, who are ranked 10th in the overall standings.
Zug, by contrast, were firmly in control of their match, winning a 4-1 victory against Lausanne, to climb to second spot in the rankings.
Lower down the table, Lugano displaced Fribourg from fourth position after wiping out the side 5-0 in Friday's game
Sixth placed Kloten also had little difficulty against lingerers, Chur, defeating the Graudunden team 4-1 to retain sixth place.
Friday's top division results in full:
Bern 2-1 Ambri
Chur 1-4 Kloten
Lausanne 1-4 Zug
Lugano 5-0 Fribourg
Rapperswil 2-2 Davos
Zurich Lions 2-1 SCL Tigers
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