The TCS Sydney Marathon's second running as a World Marathon Major arrives on Sunday morning, and the harbour city has spent race week confirming its arrival among the sport's heavyweights. Some 40,000 runners will set off from North Sydney at 6:30am local time on 30 August, crossing the Harbour Bridge in the dawn light before winding through the eastern city to a finish beside the Opera House. It is the fourth of the calendar's seven Majors, and the field assembled for it has no precedent in the race's history.

For the first time anywhere, both reigning world champions will start the same marathon on the same day. Tanzania's Alphonce Simbu, the men's world champion, faces a field headlined by Ethiopia's Sisay Lemma, the former Boston and London winner whose presence guarantees an honest pace. Peres Jepchirchir, the women's world champion and former Olympic champion, starts as favourite in a women's race stacked with sub-2:22 performers. The pairing gives Sydney the sort of headline act that London and Boston spend years assembling.

Conditions look close to ideal. The forecast calls for around 13 degrees at the start with only a slim chance of rain, though the Harbour Bridge's exposed opening kilometres carry a wind warning and most elites will start in arm sleeves. The course itself remains the great unknown for fast times: the climbs through the city and up Oxford Street make Sydney a championship-style test rather than a record chase, and last year's times reflected that. Race organisers will care little — the pictures of a full bridge at sunrise are the point.

The winter timing, unique among the Majors, has made Sydney an attractive target for athletes building towards autumn racing, and the depth behind the headliners is considerable: 25 men have broken 2:10 and twenty women have broken 2:22. A strong Australian contingent will chase home-soil history in front of the largest marathon crowd the country has staged, with organisers reporting record applications for 2027 before this edition has even been run.

Sunday's race completes a remarkable weekend for the sport, with the UTMB finishing in Chamonix as Sydney's leaders cross the bridge. For British viewers, coverage begins in the small hours — but with two world champions, a Major on winter's edge and a course that rewards racing over pacing, Sydney has earned the alarm clock. The Majors' newest member no longer needs to prove it belongs.