Macau, China - Radio Rahim catches the open workouts to Antonio DeMarco and Zou Shiming, who were joined by their mutual trainer Freddie Roach. Both fighters will appear in action on the Manny Pacquiao vs. Chris Algieri HBO Pay-Per-View undercard on Saturday night. Shiming, a two-time Olympic gold medal winner, faces Kwanpichit OnesongchaiGym of Thailand. And DeMarco, a former WBC champion at 135-pounds, is going to challenge undefeated WBA 'regular' junior welterweight champion Jessie Vargas.