Kingston - US sprinter Tyson Gay laid down an impressive early-season marker on Saturday, winning the 100m at the Jamaica Invitational athletics meeting in 9.86.
Gay, winner of the 100m, 200m and 4x10m world titles in 2007, recovered from a poor start to roar past Jamaican Nesta Carter, who finished second 17-hundredths of a second back. American Darvis Patton was third, 21-hundredths of a second behind the winner.
Gay became the first sprinter to run under 10 seconds in the 100m this season, which will be highlighted by the world championships in Moscow in August.
Gay, 30, is the second-fastest performer of all time in the 100m behind Jamaican world record-holder Usain Bolt, who was slated to run the 200m at Kingston but pulled out with a hamstring strain.
Gay, hindered by injuries in recent years, said he feels better than he has in some time.
"I'm getting back to full fitness, but I am being very patient with it," he said. "I am feeling good, the best I have been in a long while, and I am looking forward to Moscow and will give it all I've got."
In the women's 100m, Jamaican Veronica Campbell-Brown - the 2012 Olympic bronze medallist - won in 11.01. American Allyson Felix, Olympic champion in the 200m in London last year, settled for fifth place (11.13).
Jamaican Nickel Ashmeade won the men's 200m in a season-leading 20.00, beating compatriot and 2012 Olympic bronze medallist Warren Weir (20.14) and American Wallace Spearmon (20.32).
Jamaica's Stephanie McPherson won the women's 400m, lowering the world-leading mark for the third time this season with a time of 50.43. Britain's Christine Ohuruogu was second in 50.58.
Americans Dawn Harper in the 100m hurdles and Antwon Hicks in the 110m hurdles notched season-leading times.
Harper clocked 12.62 to beat compatriot Queen Harrison while Hicks triumphed in 13.25.
Principal results on Saturday in the Kingston Invitational athletics meeting:
100m (wind: -0.2 m/sec): 1. Tyson Gay (USA) 9.86sec, 2. Nesta Carter (JAM) 10.03, 3. Darvis Patton (USA) 10.07
200m (wind: -0.3): 1. Nickel Ashemeade (JAM) 20.00, 2. Warren Weir (JAM) 20.14, 3. Wallace Spearmon (USA) 20.32
400m: 1. Luguelin Santos (DOM) 45.06, 2. Tony McQuay (USA) 45.15
110m hurdles (wind: +0.3): 1. Antwon Hicks (USA) 13.25, 2. Hansle Parchment (USA) 13.26, 3. Andrew Riley (JAM) 13.28
400m hurdles: 1. Justin Gamon (USA) 49.23, 2. Kerron Clement (USA) 49.23
Shot put: 1. Ryan Whiting (USA) 21.74m, 2. Christian Cantwell (USA) 20.29m
(wind: 0.0m/sec): 1. Veronica Campbell-Brown (JAM) 11.01, 2. Kelly-Ann
Baptist (TRI) 11.06, 3. Murielle Ahoure (CIV) 11.08 ... 5. Allyson Felix
(USA) 11.13, 6. Sherri Ann Brooks (JAM) 11.29
200m (wind: +0.5): 1. Shelly Ann Fraser-Pryce (JAM) 22.38, 2. Kerron Stewart (JAM) 22.71, 3. Sherone Simpson (USA) 22.83
400m: 1. Stephanie McPherson (JAM) 50.43, 2. Christine Ohuruogu (GBR) 50.58, 3. Novlene Williams-Mills (JAM) 51.05
100m hurdles (wind: +0.8): 1. Dawn Harper (USA) 12.62, 2. Queen Harrison (USA) 12.64
400m hurdles: 1. Terea Brown (USA) 54.83