In pictures: World number one Novak Djokovic wins fourth Mubadala title

Novak Djokovic equalled Rafael Nadal's record of four titles at the Mubadala World Tennis Championship with a hard-fought 4-6, 7-5, 7-5 win over South African world number six, Kevin Anderson at the International Tennis Centre at Zayed Sports City.
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Serbia's Novak Djokovic kisses the trophy after he winning the Mubadala World Tennis Championship 2018 final 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.
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Novak Djokovic of Serbia celebartes against Kevin Anderson of South Africa during the men's final match of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 29, 2018 in Abu Dhabi.
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Kevin Anderson of South Africa congratulates Novak Djokovic on his victory during the men's final match of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 29, 2018 in Abu Dhabi.
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Novak Djokovic (R) of Serbia after winning the Men's Singles finals match alongside runner up Kevin Anderson of South Africa at Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 29, 2018 in Abu Dhabi.
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Kevin Anderson of South Africa in action against Novak Djokovic of Serbia during the men's final match of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 29, 2018 in Abu Dhabi.
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Novak Djokovic of Serbia in action against Kevin Anderson of South Africa during the men's final match of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 29, 2018 in Abu Dhabi.