Barcelona's Lionel Messi has admitted England's four contenders in the UEFA Champions League pose the biggest threat to his side in this season's competition.
The Catalan giants avoided any of the English sides in the quarter-finals draw after being paired with Schalke in the draw.
Messi is a big fan of Premier League football and he is confirmed admirer of Manchester United star Cristiano Ronaldo.
The diminutive playmaker acknowledges United, Chelsea, Liverpool and Arsenal will be Barca's biggest rivals for Europe's premier competition.
