CARSON, Calif. – Confident and determined, Andrzej “The Polish Prince” Fonfara (27-3, 16 KOs) spoiled the ring return of Julio Cesar Chavez Jr. (48-2-1, 32 KOs) in resounding fashion Saturday night, flooring the former middleweight champion one time en route to a one-sided ninth-round TKO in the main event of SHOWTIME CHAMPIONSHIP BOXING live on SHOWTIME.

Fonfara, of Chicago by way of Radon, Poland, dropped Chavez, of Culiacan, Sinaloa, Mexico, with a wide left hook 50 seconds into the ninth round before a boisterous crowd of 8,636 predominately-Chavez fans at StubHub Center. It was the first time in 52 professional fights that Chavez had hit the canvas from a punch.

Upon returning to the corner, Chavez could be heard on the telecast telling trainer Joe Goossen that he had hurt his right leg and could no longer continue. Moments later, the fight was halted. The busier and more accurate fighter throughout, Fonfara was comfortably ahead on the three judges’ scorecards by scored of 89-80 and 88-81 twice after nine full rounds.

Offered an ecstatic Fonfara, who had his fair share of Polish fans at the venue: “I knew he was a tough fighter, quick and in good shape but when he hit me for the first time in the first round, I knew I was going to win this fight. He didn’t punch as hard as everybody said he did.

“I saw his punches easily coming in. I know I threw more punches. I was a little surprised that he did not come out for the (10th) but he was cut, had been getting beat up and had just got knocked down, so he knew what would happen if he came out.

“Chavez said before the fight that he didn’t think I could take his body punches. I think I took them pretty good and passed that test.

“I know there are things I can still work on in training to become a more complete boxer, but tonight was a dream come true. I want a rematch with (Light Heavyweight World Champion) Adonis Stevenson.”

Said Chavez, the son of legendary Mexican icon, Julio Cesar Chavez Sr. in the ring afterward and before he was taken to the hospital as a precautionary measure, “Maybe 170,172 pounds is too big for me, maybe I’ll go back down. I’m not sure what my future holds. It was a very tough fight. But I congratulate Andrzej.”

Goossen told reporters afterward that he had “stopped the fight. It was my decision. I didn’t like what I saw."