Damien Howson dominated the Under-23 World Time Trial Championships by taking his victory with a 57-second advantage.
The 21-year-old Australian covered the 43.5km route between Pistoia and Florence in 49 minutes and 49 seconds to better his bronze medal showing at last year's event in Valkenburg, where Russia's Anton Vorobyev rode to gold.
The Adelaide native's performance meant Frenchman Yoann Paillot had to settle for second place, with Danish 2012 Olympic omnium champion Lasse Hansen a further 13secs back in third.
Earlier in the day, Severine Eraud of France won the women's junior time trial title to add to her European and national titles.
Eraud was 2.69 seconds quicker than Australian Alexandria Nicholls over the 16.19 kilometre course, posting a time of 22 minutes, 42.63 seconds.
Another Australian, Alexandra Manly, was third, 8.17 seconds slower than Eraud.
Nicholls had been first on the course and held the lead for most of the day, as Eraud was the last starter. The 18-year-old Eraud powered through the second half of the course after being 13.5 seconds behind Nicholls at the intermediate check.
After collecting her gold medal, Eraud said "I knew I was only fourth fastest and so didn't think I could win and was aiming for the podium. That made victory amazing and unexpected."
Under-23 men's time trial result
1 Damien Howson (Aus), 49:49:97
2 Yoann Paillot (Fra), +57secs
3 Lasse Hansen (Den), +1:10
4 Campbell Flakemore (Aus), +1:22
5 Lawson Craddock (USA), +1:41
6 Stefan Kueng (Swi) , +1:46
7 Ryan Mullen (Ire), +1:47
8 Victor Campenaerts (Bel), +1:48
9 Danil Fominykh (Kaz), +2:05
10 Eduardo Sepulveda (Arg), +2:10
Junior women's time trial result
1 Severine Eraud (Fra) 22:42
2 Alexandria Nicholls (Aus), +3secs
3 Alexandra Manly (Aus), +8
4 Zavinta Titenyte (Lit), +11
5 Anastasia Iakovenko (Rus), +13
6 Demi de Jong (Ned), +14
7 Kelly Catlin (USA), +20
8 Floortje Mackaij (Ned), +21
9 Kinley Gibson (Can), +22
10 Luisa Kattinger (Ger), +23