Construction of an Australian rules field the size of the MCG in the middle of Royal Randwick racecourse won't begin until after the running of The Everest after the Australian Turf Club agreed to a landmark partnership with the AFL.

The training field, to be used primarily by the Sydney Swans, who proposed the left-field idea to alleviate concerns over a practice base from next year, is the cornerstone of a deal between Sydney's two AFL sides and the city's sole race club.

AFL impact: Redzel winning The Everest at Randwick. Credit:AAP

A development application has been lodged with the local council in recent days and the field, if approved after gaining the tick of approval from a feasibility study, will have no effect on the racing operations at Randwick.

Swans coach John Longmire approached the ATC about shifting some of the club's training to the historic racetrack after the city's $2.1 billion light rail project played havoc with their normal facility at Tramway Oval, across the road from the SCG.