California Chrome has come out on top in a duel with Dortmund in the Grade Two San Diego Handicap at Del Mar.

It was California Chrome's first start since he won the $10 million World Cup in Dubai in March.

With regular rider Victor Espinoza aboard, the Art Sherman-trained California Chrome beat Dortmund by half a length.

"I saved something for the end. I knew I'd have to," Espinoza said.

"I have a lot of respect for Dortmund and he made me run hard. I could see he (Dortmund) was running so hard.

"When we came down the stretch, I was concerned. This horse was carrying a lot of weight - that was the challenge.

"What a terrific comeback race for him. He's back. He's such a special horse."