The defending champion beat Dominik Hrbaty of Slovakia in the quarter-finals of the RCA Tennis Championships.
The top seed won two matches on Thursday to advance to the last eight at the RCA Tennis Championships in Indianapolis.
The top seed was leading 6-4, 2-5 against Michel Kratochvil before heavy rain suspended play at the RCA Tennis Championships.
The fifth seeded German needed two hours and 11 minutes to see off the top seed and defending champion in the quarter-finals of the U.S. Clay Court championships.
Wimbledon will herald a new men's champion and for the four players left in the draw, the moment has been a long time coming.
Andy Roddick reached his first Wimbledon final with a hard-fought 6-4 4-6 7-5 7-5 victory in a semi-final played over two days and various rain interruptions.
The rising stars of men's tennis will slug it out in the third round on the show courts on Friday.
The Briton unleashed a furious verbal volley at the umpire during his match after a spectator called out during a rally in the third set.
Champion Roger Federer faces Frenchman Sebastien Grosjean for the first time in more than three years today with a place in the Wimbledon final at stake.
The pair jointly hold the record for the fastest recorded serve at 149 mph (240 kph), have met twice before with honours even.
Roddick edged past Andre Agassi while Grosjean easily beat Tim Henman in the semis of the Stella Artois Championship.
The American beat Lleyton Hewitt while the Frenchman overcame South Korean qualifier Lee Hyung-taik in the semi-finals.
Federer's bid to win his first title on the clay courts of the Rome Masters juddered to a premature halt on Wednesday when he lost his second-round clash against Spain's Albert Costa 3-6, 6-3, 6-2.
Defending champion Andy Roddick fought to defeat qualifier Paul Goldstein to reach the quarter-finals of the $380,000 U.S. Clay Court Championships.
The American No. 2 scored a fluent win over Robert Kendrick U.S. Men's Clay Court Championships.
The world No. 2 overcame shaky serving to beat Thomas Enqvist in the Davis Cup World Group quarer-final.\n\n
Andy Roddick beat Vince Spadea 6-1, 6-3, while Guillermo Coria beat Fernando Gonzalez 4-6, 7-6, 6-1 in the semi-finals of the Nasdaq-100 Open.
The top seed toiled for more than two hours to overcome Todd Martin 7-6, 1-6, 7-5 in the first round of the Kroger St Jude tournament.
The US Open champion gave the US a 2-0 lead over Austria on the opening day of their first-round Davis Cup World Group tie.
The American's hopes of getting some quality practice matches before next week's first grand slam of the year were ruined when he was knocked out of the Sydney International by Korean qualifier Lee Hyung-taik.
The Russian ace will meet defending champion Andre Agassi in the semi-finals of the Australian Open. A round-up of Tuesday's matches.\n\n
Agassi clattered former Melbourne Park runner-up Thomas Enqvist 6-0 6-3 6-3 in a breathtaking display at the Australian Open.
Argentine David Nalbandian proved too tough for the world No.1 at the Australian Open warm-up event.
But defending champion, Andre Agassi at 33 years is still the man to beat.
The world No. 1 said the players he plays with are clean.
Sweden's Jonas Bjorkman defeated the world number one 6-3, 6-4 in just over an hour at the Qatar Open.