Ishmael Miller scored a hat-trick as West Bromwich Albion qualified for the semi finals of the FA Cup with a 5-1 win at Bristol Rovers.

The young striker, who only joined permanently from Manchester City at the end of January, bullied a spirited Rovers defence into submission with goals on the half hour and on 69 and 85 minutes in a rout that was not as one-sided as the score line would suggest.

Rovers were unlucky to be two goals down after only half an hour, having gone close through Craig Dilsey, Rickie Lambert, two goal mouth scrambles and a rejected penalty appeal when Andy Williams seemed to be fouled on the edge of the box by Leon Barnett.

But the visitors - chasing promotion from the Championship and 5-0 winners at divisional rivals Coventry in the previous round - went ahead when home keeper Steve Phillips fumbled a Roman Bednar strike into the path of Morrison, who hammered a simple finish into the roof of the net on 17 minutes.

Miller doubled the lead with a curler from the edge of the box after outmuscling Rovers left back Joe Jacobson, but the hosts hit back immediately when defender Danny Coles finished after West Brom failed to clear a corner.

The hat-trick hero should have grabbed a second when he rounded Phillips just before the break, but the terrible pitch at the Memorial Stadium saw his foot get caught in a divet to send him sprawling with the goal at his mercy.

The Bristolians sensed a turning point, going close early in the second half through Disley and wide man David Pipe, but a weekend of massive upsets did not account for a fourth when - in an offside position when the ball was punted upfield - Miller latched onto an ill-advised backheader to finish past Phillips for his second of the match.

Substitute Kevin Phillips put the match beyond Paul Trollope's men when he finished off a flowing move in style with a quarter on an hour remaining, and Miller claimed the match ball ten minutes later with a well-placed finish after Zoltan Gera found him in space on the edge of the Rovers area.

Reda Maher / Eurosport