Zverev avenges loss in final, crushes Blake

   The rematch was hardly a replay.
   Unseeded Mischa Zverev crushed second-seeded James Blake 6-0, 6-2 in 41 minutes Friday in the quarterfinals of the $100,000 First Republic Bank Tiburon (Calif.) Challenger at the Tiburon Peninsula Club.
   Five days earlier, Blake outlasted Zverev 6-1, 1-6, 6-4 to win the $100,000 RelyAid Natomas Challenger in Sacramento. This time, Zverev won the first 10 games and ended Blake's Northern California winning streak at seven matches.
   Blake, the oldest player in the singles draw at almost 33, had dispatched fellow American Daniel Kosakowski, an unseeded 20-year-old who reached the Sacramento semifinals, 6-2, 6-3 earlier Friday. The match had been postponed from Thursday by rain.
   Zverev, a 25-year-old Moscow native who has lived in Germany since he was 4, will meet eighth-seeded Bobby Reynolds, 30, of Acworth, Ga., today at 11 a.m.
   Reynolds, also a semifinalist in Sacramento, edged Bradley Klahn, a 22-year-old wild card from Poway in the San Diego area, 6-4, 2-6, 7-6 (4). Klahn, who lost to Blake in the Sacramento quarterfinals, won the 2010 NCAA singles title as a Stanford sophomore but had surgery lat October for a herniated disc.
   Zverev is 1-0 against Reynolds, breezing 6-0, 6-1 on a hardcourt in the second round of qualifying at Delray Beach, Fla., on the ATP World Tour in February.
   After the Zverev-Reynolds encounter, Steve Johnson will face Jack Sock in a matchup of two of the United States' top prospects.
    Johnson, 22, routed seventh-seeded Denis Kudla, a 20-year-old American, 6-1, 6-2. Sock, 20, outplayed Rhyne Williams, 21, of the United States 7-6 (5), 3-6, 6-1.
   Johnson and Sock have split two career meetings.
   In the doubles quarterfinals, fourth-seeded Rik de Voest of South Africa and Chris Guccione of Australia nipped wild cards and Sacramento champions Tennys Sandgren and Williams 7-6 (5), 5-7, 10-4.
   Guccione won last year's doubles title at Tiburon with Carsten Ball, a U.S. native who plays for Australia. The longtime partners broke up at the end of last year, and Ball did not return to Tiburon.