Andy Roddick despatched Russian Igor Kunitsyn in four sets at Wimbledon today to set up a third-round clash with Jurgen Melzer.

Only half of the eight seeded players remain in the draw heading into the quarter-finals of the Thailand Open.

Two-time former champion Lleyton Hewitt was knocked out of the ATP Next Generation Adelaide International on Thursday after losing his round-robin encounter with Russia’s Igor Kunitsyn in three sets.

The Kremlin Cup lost its two top seeds on Friday, but only one of them was beaten on the court.

Greg Rusedski was knocked out in the second round of the Kremlin Cup by Russian Igor Kunitsyn in Moscow.