![Novak Djokovic celebrates with the ATP Finals trophy after defeating Casper Ruud in the final. Getty](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/CHECYQHAZKUROOU3XKLFYCNYLE.jpg?smart=true&auth=429960a581a8031a9ad44f0c8a841668c681536ed84945fb24337cb97f07b1cb&width=400&height=225)
Novak Djokovic celebrates with the ATP Finals trophy after defeating Casper Ruud in the final. Getty
Novak Djokovic celebrates with the ATP Finals trophy after defeating Casper Ruud in the final. Getty
Novak Djokovic ends rollercoaster year on high with historic victory at ATP Finals
A record-equalling sixth title at the season-ending tournament also saw the Serb collect the largest winner's cheque in tennis history