The 2004 Olympic gold medalist worked out on Wednesday at King's Gym in Oakland.
Ward and Green are fighting as part of the Super Six World Boxing Classic -- a series of elimination bouts at 168 pounds.
Ward says he needs to build on his 11th round win over Mikkel Kessler to stay undefeated.
"It was a great performance. I felt like we did really well, we won the title. That was always a long-term goal, but the goal is to out-do that performance. To say that is to say that I haven't rested yet. I'm still going to work and I'm still putting in the man hours," says Ward.