Swansea City 3 West Brom 1:A stunning first-half performance saw Swansea bring high-flying West Brom's excellent run to a crashing halt at the Liberty Stadium.

The Baggies were simply overrun in the opening 45 minutes, a ninth goal of the season for Michu and a Wayne Routledge double giving their hosts a 3-0 lead.

Romelu Lukaku pulled one back for the Baggies just before half-time but, despite an improved second-half display, that was as good as it got for Steve Clarke’s side.

Swansea struck the woodwork inside 90 seconds. Crisp, incisive passing was causing the Baggies all sorts of problems, and it came as no surprise when they fell behind in the ninth minute.

Dyer found space down the right and Hernandez steered his deep cross back across goal for Michu to finish from close range.

The lead doubled less than three minutes later with Hernandez again the provider.

The club-record signing set up Routledge who, after a poor first touch, found the net as Jonas Olsson’s attempted challenge saw the ball ricochet in off his shin.

Swansea’s dominance was such that goalkeeper Gerhard Tremmel was merely a spectator for much of the opening half, and West Brom’s malaise was exemplified when Peter Odemwingie managed to miscue a simple five-yard pass to Youssouf Mulumbu and send the ball into touch.

Gareth McAuley blocked sharply from Hernandez after another wonderful flowing Swansea move, and Dyer had a penalty appeal waved away by referee Lee Mason as he went down under pressure from Chris Brunt.

But the hosts did not have to wait too long for their third goal. Dyer, Hernandez and Ben Davies worked some space down the Swansea left and the full-back’s ball across the box came to Routledge, who smashed home.

Lukaku did at least give the Baggies a glimmer of hope as he fired home with the last action of the first half when Swansea failed to clear a Brunt corner.