![Serbia's Novak Djokovic celebrates his victory during the Mubadala World Tennis Championship 2018 in Abu Dhabi, on December 29, 2018. Djokovic won a fourth Mubadala World Tennis Championship title, coming back from a set down to beat Kevin Anderson 4-6, 7-5, 7-5. / AFP / GIUSEPPE CACACE](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/T5YMXCZJBVY6B7377ZPFDJPFYE.jpg?smart=true&auth=abb6e83fdaa803fd24f4d80ba00e2d239d8722e0ea839515b03c7c4bbe404488&width=400&height=225)
Novak Djokovic celebrates his victory during the 2018 Mubadala World Tennis Championship final. AFP
Novak Djokovic celebrates his victory during the 2018 Mubadala World Tennis Championship final. AFP
Novak Djokovic to join Rafael Nadal and Maria Sharapova at 2019 Mubadala World Tennis Championship
Serbian star will take on Rafael Nadal for a record fifth crown in UAE showpiece