Rafael Nadal battled past German Tommy Haas 7-6, 6-3 to reach the Cincinnati Masters quarter-finals.
World number one Roger Federer breezed through to the Halle Open semi-finals with a 6-3, 6-4 win over Germany's Philipp Kohlschreiber.
Big-serving American Sam Querrey shrugged off a nervous second set to clinch his second ATP title with a 6-4, 3-6, 6-1 victory over Australian qualifier Carsten Ball at the LA Open on Sunday.
In the semi-finals, the 13th seeded Murray will meet 12th seed Novak Djokovic of Serbia, who overpowered 14th seed David Ferrer of Spain 6-3 6-4.
Tommy Haas showed he was still capable of springing a surprise at the age of 34 by ending a three-year title drought and beating second seed Roger Federer 7-6, 6-4 in the Halle Open final on Sunday.
Roger Federer slumped to a shock 2-6, 7-6(8), 6-4 loss to German veteran Tommy Haas at the Stuttgart Open on Wednesday in a disappointing comeback after the 18-times grand-slam champion missed the entire claycourt season.
Indian tennis star Somdev Devvarman's first-round jinx continued as he lost in straight sets to German wild card Tommy Haas to bow out of the Stockholm Open.
World number one Roger Federer reached the last four of the Pacific Life Open without hitting a shot on Friday when his quarter-final opponent Tommy Haas pulled out with a sinus infection. Swiss Federer, three times champion at Indian Wells and seeking his first ATP title of the year, will next meet unseeded American Mardy Fish, who scraped past seventh-seeded David Nalbandian of Argentina 6-3, 6-7, 7-6.
German veteran Tommy Haas provided a reminder of his claycourt skills to beat Stanislas Wawrinka on Thursday and reach the quarter-finals of the Rome Masters where Rafael Nadal and Andy Murray will resume their rivalry.
His opponent Tommy Haas withdrew on Sunday with an abdominal muscle strain.
The Indian duo of Leander Paes and Mahesh Bhupathi rallied from a set down to score a 2-6, 6-3, 6-2 victory over the German pair of Tommy Haas and Philipp Petzschner in the first round of the French Open men's doubles competition, in Paris on Thursday.
Tommy Haas and Alexander Waske rallied the Germans to a 2-1 win over favourites Argentina.
In the semi-finals, Agassi beat German fourth seed Tommy Haas, while Johansson beat fellow-Swede Michael Ryderstedt.
Aiming to win their third French Open crown together, Indian veterans Leander Paes and Mahesh Bhupathi have been seeded third in the clay-court Grand Slam. They open their campaign against the German pair of Tommy Haas and Philipp Petzschner.
Czech Radek Stepanek became the first defending champion to lose in the first round of the San Jose Open in 20 years when he was ousted by Belgian Xavier Malisse 6-3, 6-4 on Wednesday.
World number four Novak Djokovic eased past Austrian Juergen Melzer 6-1, 6-4 at the Halle tournamenton Friday to set up a semi-final clash with Belgian qualifier Olivier Rochus.
Sticking to a limited schedule has helped Roger Federer enjoy a renaissance late in his career but the Swiss says rest time is now over and he is looking forward to returning to action at the Mercedes Cup in Stuttgart.
The 26-year-old has already done enough to replace Tommy Haas as the\n\nGerman No. 1 when the latest world rankings are released on Monday.
Ivo Karlovic utilised a single break of service to upset world number 10 Tommy Haas 7-6 6-4 in the quarter-finals of the US Men's Clay Court Championships on Friday.
Andy Roddick and Andy Murray eased into the quarterfinal of the Memphis International.
Spain's Carlos Moya pulled out of next week's Paris Masters on Sunday with a shoulder injury, organisers said.
The world number one was pushed by the Russian but survived to book his place in the last four of the Australian Open against German Nicolas Kiefer.
Andy Murray overcame an ankle injury and staved off two match points on his way to a 3-6, 6-3, 7-6 victory over Haas in the Pacific Life Open.
The top seed will face Kenneth Carlsen in the semi-finals after the unseeded Dane beat American Jan-Michael Gambill at the Kroger St Jude ATP event.
The Serbian's 1-6, 6-3, 6-1 defeat also ended his dream of winning an Olympic singles gold medal, the only major honour missing from his long list of accolades.
Roger Federer booked his place in the ATP World Tour Finals for a record-tying 12th consecutive year when he dismissed South African Kevin Anderson 6-4, 6-4 to reach the third round of the Paris Masters on Wednesday.
The 35-year-old's first match back in action last week at the Stuttgart Open was a flop when he suffered a shock loss to German veteran Tommy Haas, ranked 302 at the time, despite leading for a set and a half.
Fifth seed Roger Federer was dumped out of the Shanghai Open, losing to Frenchman Gael Monfils 6-4, 6-7(5), 6-3 in the third round on Thursday.
It was a routine win for top seed Novak Djokovic, but his satisfaction at reaching the Wimbledon quarter-finals without dropping a set was mixed with relief after some tricky moments against German veteran Tommy Haas on Monday.
World number three and defending champion Roger Federer suffered a surprise defeat in the second round of the Shangahi Masters on Tuesday, losing 7-6(4), 2-6, 6-3 to Spain's Albert Ramos-Vinolas.
Federer had no regrets about missing the French Open to focus on Wimbledon but said it was a move he was unlikely to repeat.
Florian Mayer put more than a year of injury problems behind him to secure a 6-2, 5-7, 6-3 victory over teenager Alexander Zverev in an all-German final at the Halle Open on Sunday.
Novak Djokovic was unexpectedly beaten by fifth-ranked Alexander Zverev, quashing his hopes of winning an Olympic singles gold medal, the only major honour missing from his long list of accolades.
The Frenchman, seeded five, had no answer to left-hander Muller's swinging serve as he bowed out 6-4, 6-4.
Nothing that has happened in the past 12 months suggests Roger Federer's hunger is diminished with victory at this year's Australian Open taking his Grand Slam title haul to 20.
Novak Djokovic outclassed Finland's Jarkko Nieminen 6-4, 6-2, 6-3 to move safely into the Wimbledon third round on Wednesday.
Novak Djokovic, Andy Murray, Rafael Nadal and Roger Federer all picked up third round wins at the Western and Southern Open on Thursday to set up a star-studded last eight in Cincinnati.
Murray pulled out of the Australian Open on Thursday having failed to recover from the hip injury that had dogged him since the summer of 2017, following his quarter-final exit at Wimbledon in July.
But for the 23-year-old Bouchard, a former world number five who has slumped to 56th in the rankings, it was another blow after her first-round exit in Indian Wells.