Defending champion Novak Djokovic survived a scare.
Rafael Nadal will return to the top of the men's world rankings after Tomas Berdych retired with a back injury during their China Open semi-final.
Here are some facts about Federer and his ranking.
A Spanish left-hander moved into the quarter-finals of the French Open on Sunday. No surprise there, although his name was not Rafael Nadal but Albert Ramos-Vinolas.
Images from the matches played on Day eight of the 2018 Australian Open at Melbourne Park on Monday
Novak Djokovic will keep Andre Agassi as his head coach when he returns to action after recovering from an elbow injury which forced him to cut short his season in July, Serbia's former world number one said on Tuesday.
World number two Roger Federer edged past Ivo Karlovic 7-6(3), 7-6(4) on Saturday to reach the Halle Open final and stay on course for his eighth title in the grasscourt Wimbledon warmup event.
Third seed Stanislas Wawrinka became the latest high-profile casualty at the Italian Open on Thursday when the Swiss was knocked out in the third round by American John Isner.
Second seed Novak Djokovic complained of a "hole" on Centre Court at Wimbledon after beating Adrian Mannarino in his delayed fourth-round match on Tuesday.
Roger Federer stared down defeat and saved two match points before knocking Tomas Berdych out of the Miami Open on Thursday with a 6-2, 3-6, 7-6(6) victory in their thrilling quarter-final.
Novak Djokovic won his fourth China Open title in five years on Sunday, prevailing 6-3, 6-4 in the final against Rafael Nadal who will replace him as the men's new world number one on Monday.
Heavyweights Serena Williams, Andre Agassi, and Patrick Rafter will represent Singapore Slammers for the home leg in the inaugural International Premier Tennis League (IPTL) to be held from December 2-4.
Marin Cilic became the first Croatian to win a Grand Slam singles final in 13 years with his victory at the US Open in New York on Monday.
With fire in their bellies, former Grand Slam champs Rafael Nadal and Roger Federer are targetting a fresh return to the tennis courts in 2017.
Stanislas Wawrinka survived a thriller against Mikhail Youzhny in the second round of the Rogers Cup on Tuesday, fighting back in both sets to prevail 7-6(3), 7-6(8).
India were handed a tough Davis Cup draw, being pitted against top seeds Czech Republic in the World Group Play-offs, to be held from September 18-20 either in New Delhi or Pune.
Top seed Juan Martin del Potro beat Nicolas Almagro of Spain 7-6(7), 7-6(1) in the semi-final of the Japan Open on Saturday to set up a title clash with big-serving Milos Raonic of Canada.
Rafael Nadal looked something close to his old masterful self on clay again as he crushed Czech Tomas Berdych.
Six weeks after completing one of the greatest seasons in tennis history, Novak Djokovic begins his 2016 campaign and warm-up for his Australian Open defense in Qatar.
Andy Murray put down an early warning for the Davis Cup final when he dismantled David Goffin 6-1, 6-0 in awe-inspiring fashion to reach the quarter-finals of the Paris Masters on Thursday.
Wimbledon finalist Marin Cilic said he had a "big mountain to climb" to defeat seven-time champion Roger Federer, but that winning the title would mean the world to him.
Rafael Nadal moved into the Miami Open semi-finals with a straight sets win over American Jack Sock on Wednesday.
Fifth seed Maria Sharapova averted an early exit on a sweltering day in Flushing Meadows. Updates from Wednesday's play.
Victoria Azarenka withstood some early pressure from Britain's Johanna Konta to continue her quest for a third Miami Open title with a 6-4, 6-2 quarter-final victory on Wednesday.
Novak Djokovic overcame a slow start to outclass Nick Kyrgios 4-6, 6-3, 6-4, 6-6 (7) in the final and win his seventh Wimbledon title in London on Sunday.
Indian Aces sailed past Singapore Slammers 26-16 in the inaugural match of the much talked about International Premier Tennis League (IPTL) in Manila on Friday.
American tennis legend John McEnroe has hailed Novak Djokovic as one of the greats of all time after the Serb again claimed the year-end world number one spot with a victory at the ATP Tour Finals on Friday.
Rafael Nadal's return to action came to a shuddering halt on Friday when the Spaniard was beaten by Slovakia's Martin Klizan in a late-night quarter-final duel at the China Open.
If it is so dark that Hawkeye stops working, then matches should be called off at Wimbledon, Roger Federer said.
Canadian tennis player Eugenie Bouchard is undecided about her participation in next month's Rio Olympics over concerns about the Zika virus, the 22-year-old said.
Novak Djokovic beat Daniil Medvedev in the US Open final to win a 24th Grand Slam singles title and equal Margaret Court's record haul.
Swiss second seed Stanislas Wawrinka won a hard-hitting battle with American Jack Sock on Thursday to reach the quarter-finals at the Rogers Cup with a 7-6(3), 6-2 triumph.
Switzerland took advantage of Novak Djokovic's absence to open a 2-0 lead over last year's runners-up Serbia in their Davis Cup tie on Friday with Roger Federer and Stanislas Wawrinka winning their singles rubbers.
World No 8 Switzerland's Stanislas Wawrinka confirmed, on Monday, his participation in the 19th edition of the Aircel Chennai Open, India's only ATP World Tour tennis event, starting December 30.
Tommy Haas kept alive his slim chances of qualifying for next month's ATP World Tour Finals when he edged past near namesake Robin Haase 6-3, 4-6, 6-4 to lift his 15th career title at the Vienna Open on Sunday.
An elbow injury forced Djokovic to retire against Czech Tomas Berdych in the quarter-finals of Wimbledon in 2017. After that came a series of early tournament exits and, finally, surgery.
In beating Czech Tomas Berdych in straight sets, the Swiss became the first man to reach 11 finals at the All England Club -- making the contention that, after knee surgery and a six-month layoff, he is back to his best at 35 more compelling than ever.
Rafael Nadal will be pose a significant Grand Slam threat again next year after showing signs of returning to his best, according to two of the Spaniard's greatest rivals.
Former world number one Novak Djokovic showed signs of rediscovering his form with a dominant 6-0, 6-1 victory over Dusan Lajovic in the opening round of the Monte Carlo Masters.
The fifth seed's success made it the first time a Japanese male player had reached the last eight at Roland Garros since Jiro Satoh made it to the semi-finals in 1931 and 1933.