WASHINGTON, Aug. 1 (UPI) -- Fourth-seeded Tommy Haas advanced at the Citi Open Wednesday with a 6-4, 7-5 win over Leonard Mayer of Argentina.
Haas, who has steadily climbed up the world rankings this year to No. 36, broke Mayer three times in the hard-court match and won 83 percent of his first-serve points.
Haas advanced to the quarterfinals, where he will face fellow German Tobias Kamke.
Kamke moved on by ousting Australian 6-4, 6-3.
Alexander Dolgopolov of Ukraine, the second seed in the tournament, cruised past Ruben Ramirez of Spain 6-1, 6-3 and will face U.S. veteran James Blake in the quarters.
Blake, who won the Citi in 2002 and was runner-up in 2005, knocked off Swiss qualifier Marco Chiudinelli 6-2, 6-4 Wednesday.
|Additional Sports News Stories|
LONDON, May 25 (UPI) --Britain's Prince William expressed his excitement at being a new dad during a visit to a London charity, a charity official said.
WASHINGTON, May 24 (UPI) --The U.S. Food and Drug Administration says it's taken a close look at a mobile app that analyzes photos of urine samples and has been in contact with its maker.