Arsenal FC goalkeeper Manuel Almunia hailed Lionel Messi as the "best player in the world" after the Argentinian international scored all of FC Barcelona's goals in a 4-1 win that secured the European champions' passage to the UEFA Champions League semi-finals. "You have to try and anticipate but it's so difficult because he is very skilful and can do whatever he wants at any moment," Almunia said. "He's the best player in the world. We have a lot of time to recover, focus on the league and keep going and give everything we have in the next game."