Complex sentence: He announced his retirement from international football following the Euro 2004 final upset-defeat by Greece due to an elleged rift between him and national coach Luiz Felipe Scolari, although this was denied.
Split into simpler sentences: He announced his retirement from international football following the Euro 2004 final upset-defeat by Greece. It was believed because there was a rift between him and national coach Luiz Felipe Scolari although this was denied.