Mark English began his season with a win in Belgium on Saturday.
English won an 800m at the IFAM indoor meeting in Ghent, recording a 1:48.66.
The Letterkenny man saw off the challenge of fellow Irish runner Zak Curran (1:49.36) and Abedin Mujezinovic (1:49.67) form Bosnia and Herzegovina.
English, the 2014 European bronze and 2014 European indoor silver medallist, who competed at the 2016 Olympic Games in Rio, will be in action at the Irish indoor championships at the weekend.
The UCD AC man has had injury interruptions in recent times, but will be looking to recapture his best form.
Letterkenny AC’s Ann Marie McGlynn recorded a new Donegal record for the half-marathon in Barcelona.
The time saw McGlynn finish in seventh spot, as she moves closer to the Ulster half marathon record, held by Catherina McKiernan (67:50).