The host, which was beaten 5-3 by Liverpool in the UEFA Europa League last week, this time came out on the right side of an eight-goal scoreline.
Raphael Nuzzolo, a scorer against the Reds, and Raul Marcelo Bobadilla each scored twice and Michael Frey and Moreno Costanzo were also on the scoresheet for the host in Berne.
It had already scored five before Tibert Pont got bottom-of-the-table Servette on the board, and after Nuzzolo restored the cushion Laglais Kouassi made it 6-2.
Sion lies four points off the top of the table in third after being held to a 2-2 draw at home to FC Zurich.
Kyle Lafferty and Xavier Margairaz put Sion 2-0 up in the first half but the visitor responded after the break through Mario Gavranovic and a last-minute equaliser from Jorge Teixeira.
Lucerne was a 2-1 winner over Thun, Adrian Winter with an early goal which was added to in the 82nd minute by Stephan Andrist before Enrico Schirinzi pulled a goal back with a late penalty.