Grasshopper will play in a tie against Aarau, having finished this season in the Swiss football elite in 11th place with 39 points, the same as last-place Yverdon. However, Yverdon had a weaker goal difference and was relegated from the Swiss elite.
Both Grasshopper and Yverdon won their last matches.
Grasshopper won against St. Gallen 2:0. Captain Amir Abrashi contributed to the second goal with an assist in the 69th minute.
Albert Vallçi of the guests was sent off with a red card, eight minutes before the end.
Winterthur secured the Super League for the next edition with a victory, defeating Sion 2:0 on Thursday night.
Winterthur finished in 10th place with 40 points, one more than Grasshopper and Yverdon.