The Mick Price-trained Extreme Choice remains the Blue Diamond favourite after the first races in the series at Caulfield.

The Blue Diamond Previews were run on Tuesday with the John O'Shea-trained Cohesion winning the colts and geldings division and the Mathew Ellerton and Simon Zahra-trained Sword Of Light successful in the fillies' division.

Blue Diamond market leader Extreme Choice ($5) and Defcon ($7) did not compete in the Previews.

Cohesion firmed from $18 to $15 with the TAB after his all-the-way win on Tuesday while Sword Of Light now shares the third line with Godolphin filly Calliope at $11 but is not nominated for the Group One race and would need to be a late entry.

Weatherly firmed to $11 from $15 after his sixth as favourite in the colts' Preview and trainer Paul Messara is hoping to go to the Prelude with the colt who also needs a late entry.

The Preludes are on February 13 with the Blue Diamond two weeks later.