WASHINGTON: Mardy Fish and Tommy Haas will meet in the Citi Open semi-final, their first match since 2007, yet the near neighbours still see plenty of each other.

After beating Xavier Malisse 6-3, 6-4 on Friday, the top-seeded Fish said he and Haas are "good friends" who often hang out and practice together.

"This is a guy that's trying to take my lunch away tomorrow, and I'm going to try to beat him any way I can," Fish said. "We'll remain friends off the court."

The fourth-seeded Haas routed Tobias Kamke 6-1, 6-2. The German is 3-1 against Fish.

"He seems to be pretty close to back to 100 percent with his health and hitting the ball as well as I've seen him hit it in a long time," Fish said.

Fish reached the semi-final in the tournament for the first time in seven tries. Haas, also making his seventh appearance in the event, reached the semi-final in 2008, too.

Eighth-seeded Sam Querrey beat third-seeded Kevin Anderson 6-4, 6-4 in another quarterfinal. Second-seeded Alexandr Dolgopolov was to face James Blake later yesterday.

Anastasia Pavlyuchenkova advanced to the women's final with a 4-6, 7-5, 6-4 victory over Vania King. Pavlyuchenkova received treatment for a heat-related illness on the humid day.