"They're probably playing the best football of any team in the league right now, " said Shaka Hislop, the former West Ham goalkeeper.

WSJ: English Premier League Soccer: The London Clubs Aren't Dead Yet

Dean Ashton soon added a third to wrap up an easy win against a Blues side who did not seriously test Shaka Hislop.

BBC: Marlon Harewood celebrates his opening goal

Arsenal added two more in the closing stages of the first-half, as Fredrik Ljungberg curled the ball past Shaka Hislop and then Kolo Toure struck.

BBC: SPORT | Football | FA Cup | Portsmouth 1-5 Arsenal