American sprinter Tyson Gay notched the world's best 100m record of 2011 with a 9.79sec run at an event in Clermont, Florida.
Gay, 28, on Saturday improved on the 9.89 run by Jamaican training partner Steve Mullings in May, for the year's fastest to date.
Gay also clocked the fastest time of 2010 with 9.78 and beat Usain Bolt, who is also the world champion, when the two met in Stockholm last year.
Gay is due to run the 100m at the Diamond League meeting in New York next Saturday.
Bolt edges Powell, Americans dominate in Rome
Kenyan Mosop smashes 30-year-old distance records
First woman chief for NYT in 160 years!
Cities with world's highest and lowest carbon emission
Nokia Siemens mulls selling stake