By Edward Chaykovsky

Trainer Freddie Roach plans to be realistic with WBO junior welterweight champion Manny Pacquiao, who defends his belt against undefeated Timothy Bradley this coming Saturday night at the MGM Grand in Las Vegas. In his last fight, a trilogy bout with Juan Manuel Marquez last November, Pacquiao struggled to a twelve round majority decision win.

If Pacquiao struggles against Bradley, Roach will ask him to retire from boxing. Another lackluster effort in the ring would certainly affect the possibility of Pacquiao securing a 50-50 deal for a mega-fight with welterweight rival Floyd Mayweather Jr.

"[Bradley is] no killer, but he tries hard," Roach said to the AP. "Manny should eat him up as he comes forward. I think Manny should look really good in this fight. If he looks bad, he retires. At least I'll tell him to. And he may be the first one who will listen to me."