Defending champion Marin Cilic had to battle hard before beating Kazakhstan's Mikhail Kukushkin 6-7, 7-6, 6-3, 6-7, 5-1 in their 3rd round match of the US Open on Friday.
Team Europe and Team World are tied at 2 after one day of the Laver Cup after play opened Friday in Berlin.
Roger Federer bounced back to form with a quick-fire win over Mikhail Kukushkin of Kazakhstan on Tuesday as he began his bid for a seventh title at his hometown tournament in Basel.
Japan's Kei Nishikori and Victoria Azarenka of Belarus continued their Australian Open preparations by swiftly marching through to the quarter finals of the Brisbane International on Wednesday.
World number one Rafa Nadal advanced to the semi-finals of the Thailand Open with a 6-2, 6-3 win over Kazakhstan's Mikhail Kukushkin on Friday.
Carlos Alcaraz won two matches to lift Team Europe to a 13-11 victory over Team World for the Laver Cup title in Berlin.
Lukas Rosol beat Evgeny Korolev 7-6, 67, 7-6, 6-2 to give the Czech Republic an unassailable 3-1 lead over Kazakhstan and propel the defending champions into the Davis Cup semi-finals on Sunday.
World number one Rafa Nadal will open the defence of his Wimbledon title against American Michael Russell and has been drawn in the other half of the draw to Roger Federer, raising the possibility of another final between the great rivals.
Serbian Viktor Troicki ruthlessly dismantled ailing Kazakh qualifier Mikhail Kukushkin 6-2, 6-3 to win the Sydney International for his second career ATP title on Saturday.
Prakash Amritraj advanced to the doubles quarter-finals of the Italy ATP Challenger event along with his partner but curtains were drawn on the campaign of Harsh Mankad in Bergamo in Italy.
Laura Siegemund entered the record books with her defeat of fifth-seeded Xiyu Wang of China in four hours, nine minutes at the Thailand Open in Hua Hin on Wednesday.
Petra Kvitova completed her preparations for an assault on a third Grand Slam title in triumphant style on Friday by downing fellow Czech Karolina Pliskova 7-6, 7-6 to win the Sydney International title.
Brazil right back Danilo has been ruled out of the rest of the World Cup after suffering ankle ligament damage in training on the eve of Friday's quarter-final against Belgium.
Top seed Alexander Zverev crashed out in the second round of the Stuttgart Open, losing to world number 170 Dustin Brown.
Serbia sealed their place in the Davis Cup quarter-finals in straightforward fashion but Britain survived another nail-biter before joining them in the last-eight on Thursday.
Serbia had their backs to the wall when Kazakh veteran Mikhail Kukushkin beat debutant Miomir Kecmanovic in a three-hour epic in the first singles rubber. But Djokovic calmly levelled the tie with a straight-sets defeat of Alexander Bublik before returning to court to team up with Nikola Cacic and beat Kazakh pair Andrey Golubev and Aleksandr Nedovyesov 6-2, 2-6, 6-3.
India's top singles player Prajnesh Gunnesaran drew world number 17 Milos Raonic of Canada as his first round opponent at the Wimbledon Championships, starting Monday.
A round-up of results from Davis Cup matches played on and Sunday
Former US Open champion Juan Martin del Potro's comeback from a lengthy injury layoff was cut short by Kazakhstan qualifier Mikhail Kukushkin in the quarter-finals of the Sydney international on Thursday.
Novak Djokovic and Roger Federer notched up contrasting victories to reach the Shanghai Masters quarter-finals on Thursday while David Ferrer fought back from a set down to knock out Andy Murray.
Japan's Nishikori was the first man representing an Asian country to break through to a Grand Slam final at the 2014 tournament before Marin Cilic stopped him in the title match.
India's Rohan Bopanna and his Pakistani partner Aisam Qureshi crashed out of the US Open after going down fighting in the men's doubles first round contest at the Flushing Meadows in New York.
Novak Djokovic will begin his Australian Open title defence against Frenchman Jeremy Chardy, while reigning women's champion Sofia Kenin meets wild card Maddison Inglis, following the draw for the year's first Grand Slam on Friday.
Defending champion Novak Djokovic was handed a tough opening round at Wimbledon when Friday's draw paired him with Germany's Philipp Kohlschreiber.
ormer world number one Andy Murray showed some more positive signs in his injury comeback but eventually went down in a bruising battle with Italy's Fabio Fognini.
champion Lleyton Hewitt and Sam Groth combined to defeat Kazakhstan in their Davis Cup doubles tie on Saturday and keep Australia's semi-final hopes alive.
Somdev Devvarman recovered from his shock Chennai Open defeat against little-known compatriot Ramkumar Ramanathan to edge past Belgium's Niel Desein in a tight opening round of the ATP Apia International qualifiers in Sydney on Saturday.
Italy sealed a place in the semi-finals of the ATP Cup by winning both singles matches against France
Spaniard Nadal was in all sorts of trouble, trailing by a set and 5-4 and with 69th-ranked Rosol serving at 30-0, but his Czech opponent framed a basic backhand volley at 30-15 and blew his chance, Nadal going on to win 1-6, 7-5, 7-6(4).
Images from the second day at the US Open, the final Grand Slam tournament of the year.
It's the most popular Grand Slam across popular social networking sites
World number two and top seed Caroline Wozniacki, runner-up at the south coast event last year, cruised into the semi-finals with a 6-4, 6-3 win over Australia's Ashleigh Barty.
IMAGES from the matches played on Day 4 of the Wimbledon Lawn Tennis Championships at All England Lawn Tennis and Croquet Club on Thursday
Laslo Djere won his first ATP title at the Rio Open on Sunday and then captured the hearts of the Brazilian crowd with a victory speech dedicated to his parents, both of whom died from cancer.
Bidding for a record-extending ninth Australian Open title, the world number one and double-defending champion remains the runaway favourite at his favourite Grand Slam where he once remarked that he felt touched by the "divine".
Playing his first match since injuring his knee at Indian Wells last month, Nadal showed no signs of rust as he raced into a 5-0 lead in the first set on Court Rainier III.
Former U.S. Open champion Juan Martin del Potro stepped up his comeback from another wrist surgery by toppling top seed Fabio Fognini at the Sydney International on Wednesday.
Naomi Osaka, winner of the past two Grand Slam tournaments, has parted ways with her coach Sascha Bajin.
Australia eased ahead of Bosnia 2-0 as John Millman thumped Damir Dzumhur 6-3, 6-2 while Alex de Minaur overcame Mirza Basic 6-3, 7-6(0), before Millman revealed the team's larger goal under captain Lleyton Hewitt.
Defending champions Rohan Bopanna and Jeevan Nedunchezhiyan were ousted from the Tata Open Maharashtra but Yuki Bhambri and Divij Sharan combined to shock the top seeds, keeping the Indian hopes alive, in Pune, on Thursday.