Federer looked more relieved than overjoyed when Tiafoe's forehand found the net on match point to keep his hopes of a 20th grand slam title alive.
World number one Simona Halep pulled out of next week's WTA Finals due to a lower back injury.
Roger Federer was proud to regain his World No 1 status last year and wants to stay top of the rankings for as long as he can, he said on Monday.
While Venus has been doing pretty well on-court, the 37-year-old is busy with some off-court chores and it reads - online shopping for the newborn.
World number one Novak Djokovic blasted past qualifier Alexei Popyrin 6-4, 6-2 to reach the second round of the Japan Open Tennis Championships in Tokyo.
Croatia and France were tied at 1-1 after Friday's singles in their Davis Cup semi-final clash in Zadar after Richard Gasquet and Marin Cilic both won their matches.
Scientists may have discovered what it takes to boast flawless skin.
Rafael Nadal sent another message that he has the world number one ranking in his sight as he began his campaign to win his sixth successive title by equalling his most emphatic victory on the ATP Tour. A superb performance of heavy serving and varied follow-ups from the baseline by the Wimbledon and French Open champion overwhelmed Florent Serra 6-0, 6-1 and carried the Spaniard to the third round of the Cincinnati Masters Series.
Leander Paes and Mahesh Bhupathi easily advanced to the quarter-finals of the US $ 2,615,000 Cincinnati Masters tournaments along with their respective partners. The sixth seeded pair of Paes and Lukas Dlouhy of the Czech Republic defeated Ivo Karlovic of Croatia and Rogier Wassen of Netherlands 6-4, 6-2 in the second round. Meanwhile, Bhupathi and his Bahamian partner Mark Knowles got a walkover from Czech pair Tomas Berdych and Radek Stepanek.
Indian Davis Cupper Rohan Bopanna and his American partner James Cerretani crashed out of the $ 2,615,000 Cincinnati Masters tournament after suffering a straight sets defeat in the first round.
'He grew up poor and faced racism as he worked to become one of the greatest baseball players of all time. Hank never let the hatred he faced consume him.'
Switzerland's Patty Schnyder defeated Austrian teenager Tamira Paszek 6-3, 6-0 on Sunday to win the Bali Classic.
Zeeshan Ali, the captain and coach of the men's team, has no clue about Paes's arrival three days before the start of the competition on Sunday.
Mahesh Bhupathi and Mark Knowles beat American wild card duo of Mardy Fish and John Isner 7-5, 6-7(5), 12-10 in the quartfinals.
Reader Geethan Rayan sent us this picture.
Andy Murray remains committed to playing a full part in Great Britain's Davis Cup defence despite the prospect of a packed schedule hampering the world number two's chances of leading the side to a repeat triumph.
Serena Williams has withdrawn from next week's Stanford Classic due to a thumb injury, organisers said on Thursday.
The fifth seds were beaten by the unseeded Argentine pair of Gaston Etlis and Martin Rodriguez in the ATP Masters.\n
Serena Williams had to overcome a stubborn effort from Madison Keys to win the first all-American women's tour final for four years in straight sets and lift the Italian Open title in Rome on Sunday.
World number six Marin Cilic will be the biggest international star in the singles field at the upcoming Chennai Open, the only ATP 250 tournament in India.
Unlike the women's US Open final there was no centre court retirement announcement on Sunday with Roger Federer putting aside the disappointment of losing to Novak Djokovic in the men's final to tell fans he will be back.
The Indo-Pak team defeated Jesse Huta Galung of the Netherlands and Michael Ryderstedt of Sweden in the final of the grass court event.
Former world number one Andy Murray won his first ATP tour singles match in nearly nine months with a 6-3, 6-7(6), 6-1 victory over American Tennys Sandgren in the opening round of the Zhuhai Championships.
World No 3 Maria Sharapova withdrew on Monday from the end-of-season WTA Championship in Istanbul due to the shoulder injury that also kept her out of the US Open.
Mahesh Bhupathi and his partner Mark Knowles of The Bahamas squandered a match point en route to an agonising three-set loss to top seeds Bob and Mike Bryan in the semi-finals of the ATP Cincinnati Masters. The fourth seeded Indo-Bahamian pair went down 4-6, 7-6 (7), 10-8 to the American brothers, who booked their third successive final berth in the US $ 2,615,000 event.
Roger Federer's reign as world number one could end this week after he was beaten 7-6, 4-6, 7-6 by Croatian Ivo Karlovic in the third round of the Cincinnati Masters.
Roger Federer came close to suffering three successive losses for the first time in five years before scrambling to a 6-7, 7-6, 6-0 win over Robbie Ginepri at the Cincinnati Masters Series on Tuesday. Federer was staring defeat in the face when he lost his serve to go 5-6 down in the second set, but Ginepri, an American ranked down at 64 in the world, did not quite have what it took to close the match out.
The scientists say the technology could lead to programmes that can solve problems that are informally stated, as well as to robots that are able to interact with humans more naturally.
Roger Federer is bidding to become the first man in the modern era to win the title for a fourth consecutive time.
Sania advanced to the second round with a 6-3 6-3 win over Spaniard Anabel Medina Garrigues.
Indian tennis ace Sania Mirza and her Swiss partner Martina Hingis ended their dream run of 2015 on a high, winning their ninth women's doubles title, in Singapore, on Sunday.
Roger Federer raced to a 6-1, 6-4 victory over American James Blake to win the Cincinnati Masters.
Spaniard Nicolas Almagro took the world No 1 to three sets at the Cincinnati Masters.
The Indo-Scottish duo beat Juan Monaco and Todd Perry 7-6(1), 6-7(5), 10-3.
Rafael Nadal was forced to retire with cramps while Carlos Moya defeated Novak Djokovic.
Overpowers Svitolina to reach second straight US Open final
David Ferrer outclassed his Spanish compatriot Nicolas Almagro in the Swedish Open final on Sunday, winning 6-1 6-2 to clinch his fourth career title.
Paes and Martin Damm beat Lukas Dlouhy and Pavel Vizner of the Czech Republic in the second round of the Cincinnati Open.
Chronic back pains forced the American crowd-favourite to withdraw from the next week's Cincinnati Masters, tournament officials said on Saturday.
Olympic tennis champion Andy Murray said he is playing the best tennis of his career at the moment and is confident of clinching his second US Open title, starting later this month.
