Spieth 'very far' from best

Young American blitzes field at the Aussie Open with sizzling final round

Rising star Jordan Spieth obliterated world No 1 Rory McIlroy by 15 strokes in his runaway Australian Open triumph but says he is "very far away" from becoming the top-ranked player.

The 21-year-old Texan blitzed the field with a sizzling course record eight-under-par 63 to win the tournament on Sunday by six shots at 13-under 271.