China's Peng pounds Bartoli in Portugal

OEIRAS, Portugal: China's Peng Shuai used a minimal amount of clay court preparation on Tuesday to knock French top seed Marion Bartoli out in the first round of the Portugal Open 6-0, 1-6, 6-4.

Peng, a 2010 semi-finalist in her only previous appearance at the event, had just limited time to train after returning to her homeland to treat a shoulder injury following a Miami second-round loss in March.

After receiving treatment in her hometown of Tianjin, she travelled on to Germany where her meagre clay preparation proved just the ticket to stunning Bartoli, the world number 14 who has now lost her last four WTA matches dating to mid-March.

Pen won in an hour and three-quarters as the erratic Bartoli produced eight double-faults and lost serve five times.

The quirky French player has reunited with her doctor father Walter as coach after several months of unsuccessful trials with other potential mentors including former Wimbledon champion Jana Novotna, but is still looking for a win.

Elsewhere in the opening round, Galina Voskoboeva of Kazakhstan beat Swede Sofia Arvidsson 6-3, 6-4 to next face two-time grand slam winner and wild card entry Svetlana Kuznetsova.

Wimbledon quarter-finalist Tamira Paszek has now gone winless for three
months since the Australian Open, with the 31st-ranked Austrian losing her seventh straight match as she went down 6-1, 6-3 to Romanian Monica Niculescu.

In the men's draw, France's Julien Benneteau joined Bartoli at the exits as the fifth seed went down to Spanish qualifier Pablo Carreno-Busta 6-3, 6-4.

Spaniard Albert Ramos will line up in the second round against number two seed Stanislas Wawrinka thanks to a defeat of Argentine Carlos Berlocq 7-6 (7/4), 2-6, 6-3. Alejandro Falla of Colombia defeated Russian Alex Kuznetsov 7-5, 6-4.

Spain's David Ferrer heads the seeding but will not start until the second round after bye handed to the top four men in the field. (AFP)