Novak Djokovic beat Rafael Nadal's replacement, Nicolas Almargro, to win in Abu Dhabi.
Kamran Jebreili/AP

ABU DHABI, United Arab Emirates (AP) -- Novak Djokovic retained his title at the World Tennis Championship exhibition tournament in Abu Dhabi on Saturday by rallying past Nicolas Almagro of Spain 6-7 (4), 6-3, 6-4 in the final.

The top-ranked Serb swept past David Ferrer in straight sets to reach the final, but he got a tough test from the 11th-ranked Almagro.

Almagro, a late replacement at the tournament for Rafael Nadal, rallied from 3-1 down in the tiebreaker to take the first set.

Djokovic broke to lead 3-1 in the second set on his way to evening the match. The third set was much tighter, with both players holding serve after eight games until Djokovic went up 5-4 and then broke Almagro to clinch the victory.

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