The hosts were ahead after 16 minutes thanks to Benjamin Huggel's strike with substitute Chipperfield sealing the win six minutes from time.

Second-placed FC Zurich could close the gap on the leaders when they face Vaduz on Sunday.

In Saturday's other matches, Aarau moved level on 16 points with Zurich after a goalless draw at Grasshoppers despite losing Mario Mutsch to a red card in the 79th minute.

Neuchatel Xamax and FC Sion played out an entertaining 3-3 draw. Ideye Brown and Tariq Chihab (two) were the scorers for Xamax while Mobulu Mfuti, Alvaro Saborio and Olivier Monterrubio replied for the visitors.