Complex sentence: Tierney has played for Scotland at under-18 and under-19 levels, but has also stated his intent to play for the Ellan Vannin team that represents the Isle of Man, his birthplace.
Split into simpler sentences: Tierney has played for Scotland at under-18 and under-19 levels. He has also expressed interest in playing for the Ellan Vannin team that represents the Isle of Man, his birthplace.