The 2020–21 season will see Glasgow Warriors compete in the competitions: the Guinness Pro14 and the European Rugby Champions Cup. The Pro14 had been reduced to 12 sides this season due to the covid-19 pandemic, as the South African sides could not take part. After being unable to fulfil their fixture against Lyon in the Champions Cup, after a number of their players contracted covid-19 and others had to isolate after playing against a covid-hosted Exeter Chiefs side (also in the European Rugby Champions Cup), the Glasgow side were then placed in the European Rugby Challenge Cup.