Frölunda, the reigning CHL champions, won at home at Frölundaborg against Finnish side Saipa, and this spring's Swedish champions Skellefteå beat Slovakian side Nitra away.
New signing Hudson Fasching, the American with NHL experience, scored in his competitive debut for Skellefteå.
Andreas Johnson and Valter Lindberg each had three points, with one goal and two assists.
In Frölunda, it was the teenagers who led the way. Finn Max Westergård, 19, and Bosse Meijer, 17, turned the game around after an early Saipa lead. Returnee Samuel Fagemo scored immediately after his six-year stay in North America.
Växjö lost 1-3 away to Mannheim.
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