Ol' Memorial Stable and Michael Tabor's A P Valentine turned in his final tune-up for Saturday's Toyota Blue Grass Stakes (gr. I) when he worked five furlongs in 1:00 at Keeneland on Monday. The A. P. Indy colt, who was on the track shortly before the maintenance break, worked in company with the older Inca Slew."He went very nicely," said trainer Nick Zito, who timed the colt in 1:00 and change. The track clockers had A P Valentine going in 1:00 flat.Meanwhile, Blue Grass probables Hero's Tribute and Dollar Bill each worked five furlongs at Churchill Downs on Sunday.Ridden by jockey Brian Beccia, Hero's Tribute was timed in 1:00 2/5 for the five-eighths of a mile workout.Trainer John Ward said he thought Hero's Tribute, runner-up in the Iroquois Stakes and third in the Louisiana Derby "fought the racetrack a little bit" in his work."I thought he was more comfortable over the racetrack the other day when it was wet and packed," he said. "That supports my theory that he's going to like a little harder, faster racetrack. Considering that he didn't handle the racetrack that well, I thought that was a pretty representative work."Dollar Bill, ridden by regular exercise partner Joanne McNamara, worked in company with 3-year-old stablemate Benge B and completed the distance in 1:00 3/5. "I thought he worked great," trainer Dallas Stewart said. "He was well within himself and sat off a workmate. He was just on cruise and we never really asked much of him. He just drew a couple of deep breaths walking home, but he was also full of himself. He stood there (after the work) and got his bath and acted like a very fit racehorse. I think we've got a fit horse. We'll see where we run Saturday. If we need to do a little more with him we can do that after the race."Dollar Bill's workmate, Benge B, breezed five furlongs in 1:01 2/5.