Melchie Dumornay scored twice as Lyon got revenge on Arsenal to open their Women's Champions League campaign with a 2-1 victory in London, while Barcelona thrashed Bayern Munich 7-1 on Tuesday.

Arsenal came back from losing the first leg at home to beat the French giants 4-1 away in their semi-final tie last season before also stunning Barca in the final to become the first English winners of the competition for 18 years.

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