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Stefanos Tsitsipas v Alexander Zverev Highlights

Stefanos Tsitsipas v Alexander Zverev Highlights

Defending champion Alexander Zverev, fresh from his victory over World No. 1 Rafael Nadal, and Greek star Stefanos Tsitsipas went into their second Round Robin match with hopes of booking a place in the semi-finals - watch all the highlights from the O2 Arena in London.