Aaron Radley expressed pride after making his debut for the Czech Republic in the 60-17 friendly defeat against Germany in Heidelberg.
A star of the Team GB squad at the last two Maccabiot in Israel, Radley qualifies to play for the Czechs as his grandmother was born in Prague and he meets the IRB player eligibility rules.
Radley, from Edgware, has played for National 2 team Lydney RFC and National 1 outfit Rosslyn Park RFC and he had a professional contract playing for La Vila in the Spanish Premiership last season.
He is now concentrating his efforts in the financial sector, but is continuing his rugby with Chinnor RFC on a pay-as-you-play arrangement.
Radley said: "I’m very proud to represent the national team of the birthplace of my grandmother. I thoroughly enjoyed the experience."
The flanker is now preparing to help the Czech team at the European Nations Cup and hopes to return to Israel for Maccabiah duty with GB in 2017.