MELBOURNE – Lucas Herbert drained an eagle at the last in a flawless eight-under-par 63 Thursday to lead the Australian Open in Melbourne and upstage LIV Golf teammate Cameron Smith who trails by two.In the women’s tournament, Australia’s Su Oh shared a one shot lead with South Korean teenager Yang Hyo-jin ahead of major winner Hannah Green.Starting on the 10th, Australia’s Herbert sunk six birdies to no bogeys before his sensational eagle propelled him into the outright lead at the second event of the DP World Tour’s 2025 season.He ended one clear of Rintaro Nakaro — Japan’s amateur…