Acapulco, Mexico: Argentina's Juan Ignacio Chela advanced to the Abierto Mexicano final Friday night when compatriot Agustin Calleri retired after pulling a leg muscle.The fourth-seeded Chela will face eighth-seeded Carlos Moya, a 2-6, 6-2, 6-3 winner over top-seeded Spanish countryman Juan Carlos Ferrero 2-6, 6-2, 6-3. Moya won the 2002 and 2004 titles."It's very sad," Chela said. "We're friends and I don't know how he's doing. I hope it's nothing serious. I wanted to win, but not like this."Chela led 6-4, 5-5 when the second-seeded Calleri stopped playing. "I'm not sad. I'm angry to lose like this," Calleri said. "I feel like I want to break something, but I know it's part of the sport.In the women's semifinals, fifth-seeded Flavia Pennetta, the Italian who won the 2005 tournament, defeated compatriot Sara Errani 6-2, 6-4, and France's Emilie Loit beat Germany's Julie Schruff 0-6, 6-2, 6-1.