![Tennis - ATP Finals - The O2, London, Britain - November 14, 2018 Serbia's Novak Djokovic in action during his group stage match against Germany's Alexander Zverev Action Images via Reuters/Andrew Couldridge](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/MHZ6YZ7CE3DQY6TDWL2VJ2YC5U.jpg?smart=true&auth=faf1fc78a58851e6a7c0e6e83d20506324a1b19b3576f05c32973bc4bc2a6877&width=400&height=225)
Serbia's Novak Djokovic in action against Germany's Alexander Zverev. Reuters
Serbia's Novak Djokovic in action against Germany's Alexander Zverev. Reuters
ATP Finals: Novak Djokovic through after dismantling Alexander Zverev
World No 1 seals his place in semi-finals after 6-4, 6-1 rout of young German Alexander Zverev