<P> Since the Premier League's formation at the start of the 1992--93 season, 14 goalkeepers have managed to keep 100 or more clean sheets in the Premier League . </P> <P> During the 1997--98 season, Peter Schmeichel became the first player to keep 100 Premier League clean sheets . </P> <P> Petr Čech holds the record for most clean sheets kept in a single season, with 24 . The record for consecutive clean sheets was also set by Čech, who became the first goalkeeper to keep ten consecutive clean sheets; Edwin van der Sar later eclipsed this when he went 14 games without conceding in 2008--09 for Manchester United . </P> <P> The first goalkeepers to keep a clean sheet in the Premier League were Tim Flowers and Erik Thorstvedt on the opening day of the inaugural season in a 0--0 draw between Southampton and Tottenham Hotspur; all other goalkeepers conceded that day . </P>

How many clean sheets does petr cech have