Complex sentence: The strike had beaten goalkeeper Petr Čech and appeared to be headed to the inside of the far post; had it been scored then Poland would have ensured a draw, and the Czech Republic would have been eliminated from the tournament.
Split into simpler sentences: The strike had beaten goalkeeper Petr Čech and appeared to be headed to the inside of the far post. Had a goal been scored Poland would have ensured a draw, and the Czech team would have been eliminated from the tournament.