Philipp Kohlschreiber upset world No 4 Nikolay Davydenko to put Germany level after Igor Andreev trounced Germany's No 1 Tommy Haas in the opening rubber.
Second seed Tommy Haas and No 3 Marat Safin were ousted from the Washington Open.
Nico Rosberg won a dramatic Australian Grand Prix on Sunday after a bungled tyre strategy dashed Sebastian Vettel's chances of a season-opening triumph and Fernando Alonso survived a spectacular crash that left his McLaren wrecked.
Rafael Nadal battled past German Tommy Haas 7-6, 6-3 to reach the Cincinnati Masters quarter-finals.
Roger Federer beat Tomas Berdych in the final in Halle to equal Bjorn Borg's record of 41 wins on the trot on grass
Formula One leader Lewis Hamilton put Mercedes on pole position for their 200th race at the German Grand Prix on Saturday while engine problems dashed Ferrari's hopes.
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.
Lleyton Hewitt breezed into the last four of the Tennis Channel Open with a 6-2, 6-0 win over Philip Kohlschrieber
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.
Lewis Hamilton won a thrilling Italian Grand Prix for Mercedes on Sunday to stretch his championship lead to 30 points over Ferrari's Sebastian Vettel, who fought back to fourth after a first lap spin.
Former Ferrari technical director and world championship-winning team principal Ross Brawn stepped back into the Formula One arena on Monday in the new role of managing director for motorsport.
Four of Nadal's closest rivals failed to make the last 16, however, as third seed Ivan Ljubicic, fifth seed Nikolay Davydenko, eighth seed James Blake and ninth seed Marcos Baghdatis were upset in their ties.
The Formula One season starts in Australia on March 17 with new regulations, changed lineups, a trio of young rookies fresh from Formula Two and the comeback of Poland's Robert Kubica.
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.
The top seeds were shocked by Tommy Haas of Germany and Jurgen Melzer of Austria in the \nPilot Pen tournament.
'Instead of fighting over whatever will be left of the present world, the permanent members of the UN security council should have raised a little finger to arrest the death and devastation around us,' notes Ambassador T P Sreenivasan.
Federer welcomed the emergence of new challengers
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.
Spain's Carlos Moya pulled out of next week's Paris Masters on Sunday with a shoulder injury, organisers said.
Vettel, who won from pole position last year in Canada to revive Ferrari's title hopes, will be hoping for the same on Sunday with world championship leader Hamilton, chasing a record equalling seventh win in Montreal, starting alongside him.
Top seed Andy Roddick blasted his way into the last four with a 6-4, 6-1 victory over Peru's Luis Horna.
In a thrilling race with two safety car periods, reigning champion Hamilton went from pole position to the rear of the field before finishing second for Mercedes in a superb fightback. Ferrari's Kimi Raikkonen was third.
Tennis coach Gavin Hopper was found guilty of charges relating to a teenage girl who attended a school where he taught.
IMAGES from Day 6 of the matches played at the US Open at Flushing Meadows on Saturday.
Fernando Alonso hopes to be racing for McLaren at this weekend's Chinese Formula One Grand Prix but the Spaniard says he is taking nothing for granted ahead of a fitness test at the Shanghai circuit. The double world champion fractured his ribs in a crash at the season-opening Australian Grand Prix on March 20 and the governing FIA's medical team then ruled him out of the subsequent race in Bahrain. He will undergo more tests at the Chinese circuit on Thursday before the third round of the 21-race season. "It was disappointing to be told I couldn't race in Bahrain, but I fully respected the decision of the FIA medical team," he said on Tuesday in a team preview for the race. "While I hope I'll be back in the cockpit on Friday (for practice), until I get the all-clear from the doctors to race, whenever that may be, we cannot assume anything.
In the semi-finals, Agassi beat German fourth seed Tommy Haas, while Johansson beat fellow-Swede Michael Ryderstedt.
Sebastian Vettel trimmed Lewis Hamilton's Formula One lead to 17 points with eight races remaining.
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.
The American No. 2 scored a fluent win over Robert Kendrick U.S. Men's Clay Court Championships.
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.
'I can sense that because we have shared a room for 20 years of our lives.'
Lewis Hamilton's lap of one minute 25.892 seconds is a track record at the Silverstone circuit.
Five-times Formula One world champion Lewis Hamilton led a Mercedes front-row lockout with a blistering pole position at the season-ending Abu Dhabi Grand Prix on Saturday.
