World number one Carlos Alcaraz cruised past Frenchman Arthur Fils 6-2, 6-1 to win the Qatar Open on Saturday and extend his perfect start to the year.
Daniil Medvedev was awarded the Dubai Tennis Championships title after his opponent Tallon Griekspoor withdrew due to an injury he suffered in the semi-finals.
Daniil Medvedev has called for a streamlined ATP calendar with only Grand Slams and Masters 1000 tournaments offering ranking points, though the Russian concedes such reforms would be difficult to implement.
Doubles is not a sideshow: Yuki Bhambri on re-invention and right support
It was third time lucky for Tsitsipas who had twice lost in the Dubai final, against Roger Federer in 2019 and Novak Djokovic a year later.
Twice ATP Finals champion Alexander Zverev booked his place in the season-ending championship after progressing to the semi-finals of the Vienna Open on Friday, marking his eighth qualification in the past nine seasons.
The Indo-Japanese wild card pair displayed remarkable grit to upset Harrison and King 4-6, 6-3, 18-16 in a match that kept the crowd on the edge of their seats.
Sinner will face 19-year-old Learner Tien for the title.
Japan Open: Alcaraz marches into quarterfinals, hails "best physio in the world" after overcoming ankle issues
Just nine days after his loss to Fritz, which snapped his 13-match unbeaten streak, the world number one defeated the American 6-4, 6-4 in straight sets, capping an incredible debut at the ATP 500 event and securing his career-best 67th season win, continuing a dream season.
The bonus amount, a 177% increase on the previous season's payout, will be distributed to players based on performance at the nine ATP 1000 tournaments, which rank just below the four Grand Slams in prestige.
18-year-old Carlos Alcaraz of Spain became the youngest to clinch an ATP 500 title at the same event on Sunday when he defeated Diego Schwartzman in the final of the Rio Open.
Iga Swiatek was the latest top player to suffer an upset loss in Montreal as the Wimbledon champion
France's Boisson wins first WTA title in Hamburg
Alex De Minaur rallied from a set down and saved three match points to claim the Washington Open title after beating Alejandro Davidovich Fokina in the final of the ATP 500 event.
Carlos Alcaraz avoided another scare at the Queen's Club ATP 500 event as the top-seeded Spaniard dispatched France's Arthur Rinderknech with little fuss 7-5, 6-4 to reach the semi-finals on Friday.
World number two Carlos Alcaraz beat seventh seed Arthur Fils 6-2, 6-4 on Saturday to advance into his third Barcelona Open final, where the Spaniard will face Denmark's Holger Rune for the title.
Alexander Zverev was heckled by a spectator during Friday's Munich Open quarter-final and the top seed asked the chair umpire to eject the individual who alluded to domestic abuse allegations against the German.
Yuki Bhambri and his Australian partner Alexei Popyrin snatched victory from the jaw of defeat to triumph in the men's doubles at the Dubai Tennis Championships.
As the spotlight shines on Carlos Alcaraz's title defence and Novak Djokovic's pursuit of a record 25th Grand Slam, a determined group of challengers is quietly preparing to shake up the draw.
24-year-old Sebastian Baez, who is looking to become the first two-time Rio Open champion, will take on Alexandre Muller after the Frenchman beat Francisco Comesana 7-5, 6-7(3), 6-3 in a marathon battle.
Eighth seed Machac, who won gold in mixed doubles at the Paris Olympics, became the third player from his country to win an ATP 500 title, following Tomas Berdych and Radek Stepanek.
Top seed Carlos Alcaraz withstood a charge from qualifier Luca Nardi for a 6-1, 4-6, 6-3 victory in the second round of the Qatar ExxonMobil Open in Doha on Wednesday.
Rohan Bopanna and his Croatian partner Ivan Dodig suffered a shock loss to the pair of Francisco Cerundolo and Nicolas Jarry in the first round match of the China Open.
Teichmann wins singles, Anshba-Pridankina claim doubles at Mumbai Open
Yuki Bhambri and his Dutch partner Robin Hasse went down in straight sets to Ivan Dodig and Austin Krajicek at the Dubai Duty Free Tennis Championships.
Yuki Bhambri made his first doubles semi-finals of the ATP 500 tour.
His previous best was 97 in February, which he had attained after winning the Chennai Open, an ATP Challenger series event.
Ace Indian tennis player Sumit Nagal was off to a winning start in Monte Carlo Masters as he defeated world number 63 Flavio Cobolli of Italy in straight sets in the qualifiers in Monte Carlo on Saturday.
India's Yuki Bhambri and his French partner Albano Olivetti crashed out of Marrakech Open after losing the hard-fought semifinal to second seeds Lucas Miedler and Alexander Erler of Austria.
Britain's Cameron Norrie fought back from a set down to beat world number two Carlos Alcaraz 5-7, 6-4, 7-5 in the Rio Open final on Sunday.
Djokovic's official website also confirmed his participation in the Dubai tournament.
Men's singles winner set to receive five times more the amount as compared to the women's champion.
Alexander Zverev received a suspended eight-week ban for smashing his racket against the umpire's chair at last month's ATP 500 event in Acapulco, for which he was expelled from the tournament.
The world number five Spaniard has won 15 straight matches since returning from a foot issue that sidelined him for nearly six months last year.
Top seed Novak Djokovic produced a stellar display to sweep aside Croatian Marin Cilic 6-3, 6-4 in the final of the ATP 250 Tel Aviv Open on Sunday and clinch his third title of the season.
Zverev deserved to be thrown out for umpire abuse, says Nadal
World No. 2 Carlos Alcaraz defeated Tsitsipas in the 2021 US Open and in last year's Miami Masters and Barcelona Open.
Serena Williams said she would have faced far harsher punishment had she engaged in similar behavior to Zverev
Nick Kyrgios was given a warning for taking too long to return Tsitsipas's serve