Paralympic star Jason Smyth just missed out on achieving the 100m Olympic standard as he clocked a time of 10.24 seconds in Florida on Saturday.
The Northern Irishman's time was 0.06 seconds outside the Olympic A standard in the meeting at the National Training Centre in Clermont.
Smyth will chase the London standard again at meetings in the US over the next three weeks.
The 24-year-old trains alongside Tyson Gay at the Clermont venue.
The Derryman set his personal best of 10.22 at the same track a year ago and Saturday's run is his second fastest ever 100m.
Earlier, Smyth had clocked a wind-assisted 10.23 in the heats in Saturday's meeting.
"I'm delighted with that. It's a fantastic season opener for him," said Smyth's coach Stephen Maguire.
"He made a few mistakes in both races so there's more to come."
Smyth later said on Twitter:"Good day at the track. My quickest ever opener 10.24. Good things ahead."
The Londonderry man has been training alongside top athletes such as American star Gay at his regular Florida base since November.
Like South African star Oscar Pistorius, Smyth's main career ambition is to compete at both this year's Olympic and Paralympic Games in London.
He competes in Orlando next week before racing again at the Clermont venue on 2 June.
The 24-year-old has also received an invitation to the Diamond League meeting in New York on 9 June.
Meanwhile, Ciara Mageean clocked 4:14 for the 1500m as she finished third at Saturday's British Milers Club meeting in Manchester behind British youngsters Laura Weightman and Jessica Judd.