Berdych Highest Seed Remaining at ATP Stuttgart

Berdych knocked out Argentine qualifier Diego Junqueira 6-1, 6-4 in 77 minutes.

Halle finalist Berdych, ranked No. 15 in the INDESIT ATP Rankings, converted four of six break point opportunities, while Junqueira went 1-10.

Former World No. 6 Lapentti edged out fellow qualifier Diego Hatfield 7-6(5), 6-2 in two hours and seven minutes.

Lapentti and Hartfield had previously only met on the ATP Challenger circuit, three years ago in Guadalajara, Mexico. Lapentti won the semifinal in straight sets.

Third-seeded David Ferrer recorded his 130 ATP-level match win, booking his place in a fifth quarterfinal of the year with a 6-3, 6-4 win over Stanislas Wawrinka in their fourth career meeting.

Local favorite Florian Mayer will meet Ferrer next, following a 6-1, 6-0 thrashing of Argentine qualifier Juan Martin Del Potro in 49 minutes. Mayer has lost in each of his three previous quarterfinals this year (Auckland, Delray Beach, Halle).

Mariano Zabaleta was unable to build on his second round victory over top seed Gaston Gaudio, as the Argentine lost to No. 13 seed Luis Horna 6-3, 6-7(6) 6-4 in two hours and 42 minutes.

Horna now challenges Juan Monaco.

Five places in the INDESIT ATP Rankings separate Monaco (No. 88) from his opponent, Houston finalist, Jurgen Melzer (No. 83), but it was this season?s Costa Do Sauipe semifinalist who advanced with a 6-4, 6-7(3), 6-4 win.

Meanwhile Vina del Mar champion Jose Acasuso made it two wins out of two against Simon Greul, backing up his ATP Masters Series Hamburg win in May, with a 7-6(4), 2-6, 6-4 win in two hours and 23 minutes.

Acasuso will take on Austrian Oliver Marach, a 6-4, 6-4 winner over lucky loser Stefan Koubek.
-- ATP