Star Cambridge galloper Turn Me Loose's fitness levels have gone up in the past fortnight and co-trainer Murray Baker is optimistic his multiple group one winner has now hit his winning weight.

The Darren Weir-trained galloper is again seen as his main danger in tomorrow's group one Futurity Stakes at Caulfield.

"Black Heart Bart has won $A3 million and, Winx apart, he's the best 1400 metre horse in Australia," Baker said.

His future will be decided after tomorrow.

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- NZ Racing Desk