Welshman Christian Malcolm won both sprints at the Slovak Gold International meeting in Bratislava.
Malcolm, who was named in Great Britain's European Cup team earlier on Tuesday, won the 100m in 10.28 seconds and then took the 200m in 20.92secs.
Sarah Claxton celebrated her European Cup call-up with a seasonal best of 13.08secs to win the 100m hurdles.
Triple jumper Nathan Douglas could be in line for a place in the squad after winning with a personal best of 17.11m.
In other events in Slovakia, Britain's Laura Turner won the 100m in 11.47secs, well ahead of Irish record holder Anna Boyle, who clocked 11.58.
And Taneisha Scanlon won the women's triple jump with 13.62m, the second time she has improved the Irish record this season.