Chelsea supporter Paul Merson has been left shocked by the news of Mauricio Pochettino’s exit at Stamford Bridge. The former Arsenal star cannot believe the timing of the announcement after the Blues finished the season on a high in the Premier League. Chelsea lost just one of their last 14 top-flight matches and shot up the table with five consecutive wins to see out the campaign. They finished above both Newcastle and Manchester United in sixth place to guarantee European football for next season. But it wasn’t enough for the club’s hierarchy, who met with Pochettino on Monday and Tuesday be…