Undefeated WBC middleweight champion and Son of the Legend, Julio Cesar Chavez Jr. (46-0-1, 32 KOs), of Culiacan, Mexico, and two-division world champion and pound for pound kingpin with the matinee idol looks, Sergio “Maravilla” Martinez (49-2-2, 28 KOs), of Quilmes, Buenos Aires, Argentina, will make their Las Vegas Grand Arrivals TODAY at the South Valet Entrance of Wynn Las Vegas (3131 Las Vegas Blvd. South, Las Vegas, Nev. 89109.) to officially kickoff Fight Week. Open to the public, Martinez will arrive at 12:30 p.m. PT, followed by Chavez Jr. at 1:00 p.m. PT.