Jason Smyth will make a double attempt to achieve the Olympic 100m standard this weekend, running at Loughborough on Saturday and the National Championships in Santry on Sunday.
The Paralympic 100m and 200m champion will run at Loughborough Stadium on Saturday and Santry on Sunday.
The visually impaired athlete will compete against training partner Paul Hession and Irish under-23 champion Steven Colvert in Santry.
The time Smyth is looking to dip under is 10.18 seconds, well short of his times of 10.47 an 10.52 achieved at the recent European Championships.
Smyth will be seeking to return to the form he showed in May, when he clocked 10.24 in the US.