Jannik Sinner secured the year-end world number one ranking by beating Czech 30th seed Tomas Machac in the Shanghai Masters semi-finals.
Tsitsipas had lost all five previous matches against the Russian, but turned the tables in impressive fashion.
Australian bad boy Bernard Tomic has shrugged off his Miami arrest and banishment from the Davis Cup team to successfully defend his ATP title in Bogota.
Nagal is coming off a title triumph during the Heilbronn Challenger last week, which happens to be his second Challenger title this season after the Chennai Challenger in February.
Sumit Nagal got the big break as he was the highest ranked player in that draw.
The 26-year-old has not always handled the expectations placed on his shoulders after he won the Wimbledon junior title in 2008 with a game style uncannily like Federer's.
World No. 72 Nagal has a tough road ahead as he is placed in the same section of the draw as top seed and World No. 1 Jannik Sinner
Yuki Bhambri made his first doubles semi-finals of the ATP 500 tour.
For the second consecutive Davis Cup tie, India are relying on doubles specialist N Sriram Balaji to do the singles duty
Top-ranked Iga Swiatek of Poland faces Irina-Camella Begu of Romania in the opening round of the women's draw with second-seeded American Coco Gauff taking on Australian Ajla Tomljanovic.
A summary of sports events and sports persons, who made news on Monday
Grigor Dimitrov claimed the biggest title of his career and sent out a huge statement of intent as the stylish Bulgarian beat David Goffin 7-5, 4-6, 6-3 to win the ATP Finals.
Roger Federer got back on track at the ATP Finals with a 7-6(2), 6-3 defeat of Italian Matteo Berrettini on Tuesday.
Rafael Nadal's decision to end his season early means Cilic is actually holding the last berth for the eight-man showdown at London's O2 Arena.
Serbian tennis ace Novak Djokovic has continued his domination on an unchanged top 10 in the latest men's tennis rankings issued by the ATP on Monday.
Japan's Kei Nishikori will make a third straight appearance at the ATP Tour finals next month after becoming the fifth player to qualify for the season-ending tournament, organisers said on Wednesday.
Jannik Sinner is primed for a Wimbledon title tilt after picking up his first grasscourt trophy at Halle
Roger Federer added yet another record to his vast collection when he guaranteed becoming the oldest ATP world number one by beating Dutchman Robin Haase 4-6, 6-1, 6-1 to reach the semi-finals in Rotterdam on Friday.
Chilean 21st seed Nicolas Jarry outclassed American Tommy Paul 6-3, 6-7(3), 6-3 to reach the Italian Open on Friday as former champion Alexander Zverev recovered from a slow start to beat Chilean Alejandro Tabilo 1-6, 7-6(4), 6-2.
Former Australian player Brad Drewett was named on Thursday as the new head of the men's governing tennis body the ATP.
Having dug in early on to stay with Federer, Nishikori ended up running away with the match to inflict a first straight sets defeat in the ATP Finals round-robin stages on the 20-time Grand Slam champion.
The Railway Board has reduced the speed of semi-high speed trains Gatimaan Express and Vande Bharat from 160 kmph to 130 kmph till the automatic train protection system gets operational.
A mouthwatering finale to the season ended before it even began on Sunday when Roger Federer was forced to pull out prior to the ATP World Tour Final showdown with Novak Djokovic.
Rafa Nadal suffered a setback in his Paris 2024 Olympics preparations on Sunday as he was beaten 6-3 6-2 in the Swedish Open final by Portuguese seventh seed Nuno Borges.
Alexander Zverev has agreed a settlement after the mother of his child accused him of physical abuse and a German court closed the case on Friday, the French Open semi-finalist's lawyers said
The 36-year-old was given a thorough workout by Sock although had he been a little more clinical the scoreline would have been more heavily-weighted in his favour.
The ATP had fined him US$106,000 for failing to attend an interview. The world no 1 says he has been defamed and wants the fine dropped.
Riding on his sizzling performance in the Japan Open, Leander Paes is once again knocking the doors of the top-five zone as he gained two spots to be placed sixth in the ATP doubles world rankings, issued on Monday. Paes and Lukas Dlouhy reached the final of the Japan Open last week but lost the summit clash, missing out on the opportunity to pocket back-to-back ATP titles.
Indian Davis Cupper Mahesh Bhupathi and Mark Knowles cruised into the finals of the euro 891,000 ATP Swiss Indoor tournament, defeating Argentine pair Jose Acasuso and Agustin Calleri in straight sets in Basel on Saturday.
Britain number one Andy Murray has overtaken 14-time Grand Slam champion Rafael Nadal to claim the third spot in the ATP world rankings.
The ATP launched a novel advertising campaign to promote the game at all its tournament sites.
Rafael Nadal teamed up with Norwegian Casper Ruud to register a 6-1, 6-4 win over second seeds Guido Andreozzi and Miguel Reyes-Varela on the Swedish clay.
India's first and only tennis medal in the history of Olympic Games came way back in 1996, when Leander Paes claimed the singles bronze in Atlanta.
The former Wimbledon champion has decided to take on the tournament director's role at next year's World Indoor tournament.
Novak Djokovic's tremendous run of form since the start of the year means the Serb has already booked his spot at the ATP World Tour finals in London.
Ronaldo got involved in ball kid duties while watching world number one Novak Djokovic's opening match against John Isner of America as the tennis ball bounced into the stands near the first row where he was sitting.
French Open and Wimbledon champion Alcaraz, who won both of his previous meetings with Sinner this year, recovered from a slow start to wrap up victory in three hours, 21 minutes and improve his head-to-head record with the Italian to 6-4.
Teenager Kei Nishikori became the first Japanese to reach an ATP final at the Delray Beach International.
The opening match in the Pete Sampras Group produced a feast of stylish backhands from both players but it was Dimitrov, the first Bulgarian to qualify for the tournament in its 48-year-old history, who overcome some late jitters to prevail.
