Novak Djokovic maintained his unbeaten start to 2020 by beating Stefanos Tsitsipas 6-3 6-4 in the Dubai Duty Free Tennis Championships final.
Djokovic, who saved three successive match points in his semi-final win against Gael Monfils on Friday, won his 21st consecutive match - 18 this season - to claim the Dubai title for a fifth time.
The world number one converted all three of his break points against Tsitsipas to triumph in one hour and 19 minutes and has now won 43 of 49 sets played this year.
It was Djokovic's 79th ATP title win, which places him fifth on the all-time list behind Jimmy Connors (109), Roger Federer (103), Ivan Lendl (94) and Rafael Nadal (84).
Tsitsipas, the second seed, was broken in the eighth game of the first set and Djokovic then served out to take it in 40 minutes.
The Serbian lost his serve in the fifth game of the second set, but immediately broke back and sealed another decisive break in the ninth before successfully serving for the match.
Djokovic began the season by helping Serbia win the inaugural ATP Cup in Brisbane and won the Australian Open for a record-extending eighth time in Melbourne prior to his latest win in Dubai.
Meanwhile, Rafael Nadal won his first title of the year with an emphatic performance against American Taylor Fritz in the Mexican Open final.
The Spaniard trounced Taylor 6-3 6-2 in Acapulco, the American making a series of unforced errors in the second set before Nadal brought up match point with an ace and Taylor returned long to end the match.
The result means Nadal has now won the Mexican Open on three occasions.
"I couldn't be happier," he said, in quotes reported by atptour.com. "I played a great event from the beginning to the end.
"Acapulco was the first big title that I won in my career, so to be able to stay here after 15 years is amazing. I can't thank enough the people who make me feel at home every single time."