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Internet giant Amazon has signed an exclusive deal in Germany securing the rights to 16 Champions League matches a season.

This will give the firm its pick of the Tuesday night matches in the group and knockout stages for three seasons in 2021 to 2022.

Rights to Champions League matches in Germany are held by Sky Deutschland. Other than the deal with Amazon, a package of matches is sub-licenced to sports streaming service Dazn.

Amazon has taken this move to challenge the likes of BT and Sky, which hold the exclusive rights to showing Premier League matches in the UK.

Earlier this year, it streamed 10 Premier League matches on its Prime Video service, which attracted a record number of sign-ups from new subscribers.

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Ahead of the US market open, one stock to watch is sportswear maker Under Armour which is under investigation by US authorities over its accounting practices.

The probe, first reported by the Wall Street Journal, is said to examine whether the firm moved sales from quarter to quarter to boost the appearance of its finances.

An Under Armour spokesperson said that in July 2017, the company began responding to "requests for documents and information relating primarily to its accounting practices and related disclosures, and the company firmly believes that its accounting practices and disclosures were appropriate".

The company is due to report third quarter results later.