Dwain Chambers kept his Olympic dreams alive by winning the 100 metres at the trials in Birmingham, while teenager Adam Gemili is guaranteed a place in London if he wants it.
Chambers, 34, used all his experience to claim his sixth national title at the Alexander Stadium, clocking 10.25 seconds to edge out Gemili, with James Dasaolu in third.
Only Gemili and Dasaolu had the current 'A' qualifying standard of 10.18secs and could therefore secure their Olympic place by finishing first or second on Saturday, while Chambers now has until July 1 to run the time and confirm his place.
Gemili, who came from nowhere to become the second fastest man in Europe this year when he clocked 10.08s in Germany earlier this month, has always insisted that his main priority is next month's World Junior Championships in Barcelona.
The 18-year-old still plans to compete in Spain from July 10-15 in both the 100m and 200m, but took advantage of an exemption from the junior 100m trials last week to conserve his energy for this weekend. And that paid dividends for the former footballer who was on the books of Chelsea, Reading and Dagenham and Redbridge until he decided to concentrate on athletics in January.
Asked if he would compete in London, Gemili said: "Of course. Everyone wants to go. I ran the time and I'm in the team. I'm really pleased."
The honour of being the first athlete this weekend to seal their place on the Olympic team earlier fell to Sophie Hitchon in the women's hammer, while world champion Dai Greene claimed victory in the 400m hurdles, with training partner Jack Green also securing his place on the team for London with a late surge to overtake Nathan Woodward and take second.
Woodward's hopes were dashed when he stumbled over the final hurdle, while Rhys Williams crashed to the track after hitting the penultimate barrier. Both will now face an anxious wait to see if they receive the final discretionary place.
Elsewhere, Olympic champion Christine Ohuruogu and Shana Cox secured their places in London by finishing first and second in the 400m respectively, while Greg Rutherford and Steve Lewis will also be in London after winning the long jump and pole vault respectively.
Further qualifiers came in the 1,500m with Andy Baddeley and Ross Murray finishing first and second, while Tiffany Porter sealed her place in the 100m hurdles despite finishing second to heptathlon star Jessica Ennis, who had earlier also won the high jump title with 1.89m.