Reigning world champion Yohan Blake and 2008 Olympic champion Shelly-Ann Fraser-Pryce, both of Jamaica, won 100-meter titles Saturday at the Diamond League Athletics Meet here. The day also saw the triumphant return of Tyson Gay in a B-level 100 race, a romp by 800m world champion David Rudisha and another failure to reach an Olympic time standard for South African Oscar Pistorius. Blake battled back to edge Trinidad and Tobago's Keston Bledman at the line in 9.90 seconds, winning by .03, with American Michael Rodgers third in 9.99 and 2008 Olympic runner-up Richard Thompson fourth in 10.09. Blake, aided by a 0.7m/sec tailwind, will best tested by training partner Bolt, Asafa Powell and a host of rivals at the Jamaican Olympic trials in late June and says a Jamaican 100m Olympic podium sweep is “more than possible”. Dutchman Churandy Martina edged Jamaican Nickel Ashmeade in a photo-finish for the 200m title in 19.94, both .03 off Blake's 2012 world-best 200m time, and former world champion Sanya Richards-Ross won the women's 200 in 22.09. Former world champion Gay, running into a headwind of 1.5m/sec, prevailed in 10.00secs with Jamaican duo Kemar Bailey Cole and Jason Young second and third in 10.30sec in a photo-finish. Fraser-Pryce, the 2009 world champion and defending Olympic champion, grabbed the lead early and won in 10.92 seconds, her best time so far this year coming three weeks before Jamaica's Olympic trials. American Tianna Madison was second in a personal-best 10.97 with Carmelita Jeter, whose 10.81 is this year's world best, third in 11.05. Kenyan's world record-holder Rudisha cruised to victory in 1:41.74, the fastest time in the world this year. Kenyan Alfred Kirwa Yego, the 2007 world champion, was a distant second in 1:44.49. ‘Blade Runner' Pistorius, trying to run 45.30 to be considered for an Olympic berth at 400m, was last in 46.14 but confident he could meet the standard by the end of June. Ethiopian Tirunesh Dibaba, reigning 5,000 and 10,000 Olympic champion and 5,000m world record-holder, won the 5,000 in 14:50.80 with compatriot Meseret Defar, the 2004 Olympic and 2007 world 5,000m champion, 6.22 seconds back.