Complex sentence: On 5 March 2005, Čech set a new Premier League record of 1,025 minutes without letting in a goal, though hhis record has since been broken by Manchester United's Edwin van der Sar.
Split into simpler sentences: On 5 March 2005, Čech set a new Premier League record of 1,025 minutes without letting in a goal. This record has since been broken by Manchester United's Edwin van der Sar.