TAB has opened markets on three of the big Group One races of the 2019 Sydney Spring Racing Carnival.

Reigning Epsom Handicap titleholder Happy Clapper has been given top weight of 59.5kg in this year's race at Randwick.

Horses, NRL and AFL will converge at Randwick for Epsom Day where fashion will also fire up to set the scene for spring racing.

Happy Clapper remains the Epsom Handicap favourite ahead of six horses from the Chris Waller stable.

Three-year-old Trapeze Artist will not back up in the Epsom Handicap from his Golden Rose win but Gerald Ryan still has two possible runners.