ROME, July 15: World and Olympic champion Jeremy Wariner became the fourth fastest 400 metres runner in history with a time of 43.62 seconds at the Golden League meeting on Friday.
Jamaican Asafa Powell came up short in his bid to take sole ownership of the 100 metres world record with a time of 9.85.
The highly anticipated 400 metres duel with young American Xavier Carter, who on Tuesday ran the second quickest 200 metres ever, never materialised when 22-year-old Wariner simply pulled away heading into the final half, to win by more than a second.
Powell overcame a sluggish start in the 100 start to equal former world record holder Maurice Greene's meeting record set in 1999.
Powell shares the world mark of 9.77 with American Justin Gatlin.
Jamaican Sherone Simpson fought off a late charge by Marion Jones in the women's race to hand the American her first defeat of the season.
Simpson, the fastest woman this year, won in 10.87 ahead of Jones' 10.91, her best of the season.
The 21-year-old Simpson produced the year's fastest time of 10.82 at last month's Jamaican championships.
Sanya Richards continued her dominance in the women's 400 with a 49.31 victory to remain undefeated in seven contests this season.
Richards's late surge easily outdistanced Jamaican Novlene Williams, who clocked a career best 49.65.
Kenya's Daniel Kipchirchir Komen outsprinted world champion Rashid Ramzi of Bahrain in the final straight of the 1,500 to win in three minutes 29.02 seconds – the fastest time in the world this year.
Ramzi lowered his Asian record to 3:29.14 seconds in a high calibre race in which the top 10 all ran under 3:33.
Ethiopia's world champion Tirunesh Dibaba beat compatriot and world record holder Meseret Defar over 5,000 metres for the second race in a row.
As in Paris last weekend, Dibaba outsprinted Defar to win by more than a second in 14:52.37.
Wariner, Richards, Powell and Dibaba all remain in the hunt for a slice of the IAAF $1 million jackpot.
100 metres (race 2): 1. Shawn Crawford (US) 10.02 seconds; 2. Marc Burns (Trinidad and Tobago) 10.13; 3. Churandy Martina (Netherlands Antilles) 10.17.
400 metres (race 1): 1. Jeremy Wariner (US) 43.62 seconds; 2. Xavier Carter (US) 44.76; 3. LaShawn Merritt (US) 44.77.
400 metres (race 2): 1. Gary Kikaya (Democratic Republic of the Congo) 44.66 seconds; 2. Michael Blackwood (Jamaica) 44.94; 3. Marc Raquil (France) 45.01.