A 2-2 draw in Kloten was enough to see the Zurich Lions extend their lead at the top of the Swiss ice hockey league to four points.
Fourth placed Kloten took a well-deserved first period lead after squandering an incredible seven power play opportunities. But Andy Keller's goal was swiftly cancelled out by two Zurich goals, Edgar Salis and Pat Lebeau scoring what seemed to have been the decisive goals.
With just 45 seconds of regular time remaining, though, Ronny Keller shot the puck high into the corner of the Lions' net. Neither side were able to score in overtime leaving the 102nd Zurich derby in stalemate.
But Zurich had no cause for regret as both their nearest rivals suffered defeats.
Davos were beaten at home for the second time this season, losing 5-3 to Rapperswil. Ambri were also embarrassed in front of their home crowd, going down 3-2 against the relegation-threatened Langnau Tigers.
Lugano took full advantage of their rivals' slip-ups, climbing into fifth position with a 4-1 home win over bottom side La Chaux-de-Fonds. An identical score line in Berne's Allmend stadium saw the home side ease their own relegation fears at the expense of Zug.
In the night's remaining game second-bottom Chur pulled off a 5-3 home win over third-bottom Fribourg. Chur forwards Theo Wittman and Bill McDougall made an impressive comeback from injury layoffs, scoring three goals between them.
swissinfo with agencies