VALENCIA, Spain, Nov. 3 (UPI) -- Sam Querrey ousted second-seeded Jo-Wilfried Tsonga in straight sets Thursday in taking a quarterfinal spot at the Valencia Open 500 tennis tournament in Spain.
Querrey, the world No. 118, defeated Tsonga 7-6 (7-5), 6-2 without dropping serve. He won nearly three-quarters of the points on serve and took over the match with a pair of second-set breaks.
Tsonga, No. 7 in the world, is still fighting for an automatic invitation to the ATP World Tour Finals.
Querrey advanced to the tournament quarterfinals against sixth-seeded Juan Martin del Potro, who finished the day's schedule with a 6-4, 6-4 win over Kevin Anderson. Del Potro also won almost 75 percent of the points on serve and countered on dropped serve with three breaks.
Marcel Granollers earned a quarterfinal slot opposite third-seeded Gael Monfils by getting past Marin Cilic 3-6, 6-3, 7-5. He had a pair of third-set breaks to take the match, in which both players won 90 points.
Also Thursday, Juan Monaco beat Fabio Fognini 6-3, 6-1 and Juan Carlos Ferrero battled Alex Bogomolov Jr. for nearly three hours before claiming a 7-6 (7-3), 4-6, 6-2 decision.
Monaco and Ferrero are paired against each other in Friday's quarterfinals with the winner advancing to the semifinals against eighth top-seeded David Ferrer or Nikolay Davydenko. The other half of the draw has the Monfils-Granollers and del Potro-Querrey matches.