Roger Federer beat Germany's Nicolas Kiefer while Croatian Ivo Karlovic ground down Czech fifth seed Tomas Berdych. The other semi-final will be contested between Jarkko Nieminen and Marcos Baghdatis.
Croat Ivo Karlovic beat Marat Safin 6-3, 6-4 in the first round of the Madrid Masters.
Thomas Johansson saved five match points to upset defending champion James Blake and reach the final of the Stockholm Open.
Mariano Zabaleta upset James Blake 7-5, 7-6 to advance to the final of the US Clay Court Championships.
Prakash Amritraj began his campaign at the Hall of Fame Tennis Championships with an easy straight sets win over Flavio Cipolla, in Newport.
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.
World number one Roger Federer and Andy Roddick also advanced into the third round.
The Indo-Czech duo beat Chris Haggard and Ivo Karlovic 6-7 (3), 6-3, 10-8 in the quarterfinals.
The victory avenged the Croat's quarter-final defeat at the hands of Clement at Queen's last week.
Croatia's Ivo Karlovic posted a 6-4, 6-1 victory over Argentine Mariano Zabaleta in the Houston final.
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.
Ivo Karlovic ousted sixth seeded German Benjamin Becker 7-5 7-6 in the first round of the U.S. Clay Court Championships on Monday.
Ivo Karlovic has a winning serve but his lack of movement on court proves his undoing.
India's challenge in the doubles at the Chennai Open ended as Vishal Uppal and Ashutosh Singh lost to Tomas Behrend and Robin Vik.
Cash believes there will never be a return to the golden era of serve-and-volley tennis, however, not while the court speeds were so much slower than when he was winning at the All England Club.
Britain's Johanna Konta overpowered Agnieszka Radwanska 6-4, 6-2 in a one-sided victory in the final of the Sydney International on Friday to claim her second career WTA title.
Top seed Ivan Ljubicic was the only seed to reach the quarter-finals of the Zagreb indoor tournament
Mardy Fish beat Ivo Karlovic 7-6, 6-4 to reach the final of the ATP event in New Haven.
Gael Monfils loses in Cincinnati amid accusations of tanking.
The French flag flew proudly in Montreal on Monday as Gilles Simon and Gael Monfils advanced to the second round of the Rogers Cup.
The semi-final line-up at the Rome Masters ATP tournament resembles a Davis Cup tie after Spanish and Argentine players claimed all four berths.
Lleyton Hewitt breezed into the last four of the Tennis Channel Open with a 6-2, 6-0 win over Philip Kohlschrieber
Andy Murray battled back to beat unseeded Ivo Karlovic 6-7, 6-4, 7-6 to defend the San Jose Open title.
Defending champions Andy Murray will play Ivo Karlovic in the final of the San Jose Open.
In the other semi-final at the San Jose Open, German sixth seed Benjamin Becker, who upset Marat Safin will take on Ivo Karlovic.
German sixth seed Benjamin Becker beat Marat Safin to set up a semi-final meeting with Ivo Karlovic, who had earlier dispatched fifth seeded American Mary Fish at the San Jose Open.
The American was beaten by world number 103 Ivo Karlovic of Croatia in the second round.
World number 103 Ivo Karlovic of Croatia beat James Blake 6-7, 7-6, 6-4 in the second round.
Tomas Berdych beat James Blake after Andy Roddick had give the US a 1-0 lead.
Croatian beanpole Ivo Karlovic upset top-seeded compatriot Ivan Ljubicic to reach the quarter-finals of the grasscourt Nottingham Open on Wednesday.
Champion Paradorn Srichaphan of Thailand eased into the second round of the Nottingham Open with a 6-3, 6-2 victory over British qualifier Mark Hilton on Tuesday.
The third seeds went down to the unseeded Croatian pair of Ivo Karlovic and Lovro Zovko at the Swiss Indoors tournament.
Wimbledon picks up the pace dramatically today with the fourth round of the men's and women's singles.
rakash Amritraj went down to Ivo Heuberger of Switzerland 4-6, 4-6, at the ATP Chennai Open tennis tournament.
The American won his third successive Stella Artois title with a tight 7-6, 7-6 victory over Croatian Ivo Karlovi.
Harsh Mankad and Prakash Amritraj registered straight set wins to advance into the quarterfinals of the Nottingham Challengers.