Premier League football is showing a sharp decline with regards to performance in the Champions League.Manchester United’s 3-2 aggregate win over Olympiacos saw David Moyes’ side join Jose Mourinho’s Chelsea in the last eight as England’s two representatives in the competition, following Arsenal and Manchester City’s exits.It means only three English sides have made the quarter-final of the competition in the last three years, compared to 13 in the four seasons prior to that.No Premier League side made it to the last eight last season and Chelsea got there in 2012 – though the Blues did go on to win the trophy.Compared with three sides in 2011, two in 2010 and all four making it in 2008 and 2009, it seems that Premier League sides are falling behind their European counterparts.English clubs made the final in six of the seven years between 2005 and 2011, but only won the competition twice, Liverpool in 2005 and Man United in 2008.