YOUNGSTOWN - Tickets for Kelly Pavlik's middleweight title defense Feb. 21 at the Chevrolet Centre go on sale at 10 a.m. Saturday. Tickets are available at the Chevrolet Centre box office, Ticketmaster.com, Giant Eagle or Macyás, or by phone at 800-745-3000. There is a limit of eight tickets per customer. Prices range from $50 to $500. Pavlik will be taking on Marco Antonio Rubio of Mexico for the combined WBC/WBO middleweight championship belt.