QPR pair Charlie Owens and Paul Smyth suffered defeat with Northern Ireland Under-21s on Tuesday evening.
The R’s duo were in action in the Irish’s UEFA European Championship Under-21 qualifier against Slovakia.
However, László Bénes' goal in the 61st minute handed the Slovaks victory in Group 2.
Striker Smyth, who joined Rangers ahead of the transfer deadline last month, was substituted after 78 minutes whilst midfielder Owens completed the full 90 minutes.
Northern Ireland are second in table following three matches as they bid to qualify for the finals in Italy and San Marino in 2019.