Dasaolu became only the fourth Brit to break the 10-second barrier as he ran 9.91secs in the semi-finals of the Sainsbury’s British Championships in Birmingham.
Only former Olympic champion Linford Christie has run faster, with a time of 9.87secs in the 1993 World Championships.
The 25-year-old comfortably secured his place in the British squad for the World Championships next month – but is adamant his stunning performance at the Alexander Stadium had always been within his reach.
“If you look at my season progression I knew a sub-10 was coming,” said Dasaolu, who withdrew from the final due to suffering with cramp.
“We knew we were in a good place and I knew it was on the cards.
“It happened and I managed to record a PB of 9.91secs and it feels brilliant.
“I’m just happy to be one of the best sprinters in Britain. Going a sub-10 now gives me that confidence that when I stand with other sub-10 runners I know I can challenge them.”
Sainsbury’s British Championships is the second event in the Sainsbury’s Summer Series. For more information on Sainsbury’s support of world class athletics and disability sport go to www.sainsburys-live-well-for-less.co.uk/occasions/anniversary-games/