S.F. native Querrey to meet Tsonga in showdown

   Sam Querrey will try to pull off an upset in the third round at Wimbledon for the second consecutive year.
   Querrey, a 29-year-old San Francisco native seeded 24th, set up a showdown against 12th-seeded Jo-Wilfried Tsonga of France with a 6-4, 4-6, 6-3, 6-3 victory over Nikoloz Basilashvili of Georgia today at the All England Club outside of London.
   Tsonga, a two-time Wimbledon semifinalist, dismissed Simone Bolelli of Italy 6-1, 7-5, 6-2. The 32-year-old Tsonga is 4-1 against Querrey, including a 4-6, 7-6 (2), 6-7 (4), 6-3, 14-12 victory in the second round at Wimbledon in 2014.
   Querrey, who now lives in the Los Angeles suburb of Santa Monica, stunned Novak Djokovic in the third round at Wimbledon last year en route to the quarterfinals for his best Grand Slam result. Djokovic was ranked No. 1 at the time and had won the past two Wimbledon titles.
   The loss to Querrey marked the beginning of an ongoing tailspin for Djokovic, now ranked fourth.