Returned to the starting eleven after missing defeat at home to Yeovil but conceded two goals in quick succession having had little to do in the game until Bony's arrival.
Fired in an early cross for Novak's opening goal in a game where he enjoyed venturing forward thus restricting Lamah's attacking movements. But the table's turned in the second when he was pinned back, also at fault for the second.
Led with commitment and aggression at the back but saw his efforts earn him the game's first booking at he went in strong on the Swansea keeper from a corner.
Brought into the side in place of Mullins and had a decent game in defence alongside Robinson, as the club continue with their lack of centre-back options.
Found some joy on the left in the first-half with crosses into the box and strong link-up play with Hancox. Made strong movements down the flank and inside and looked his side's brightest spark before being replaced.
Made strong movement forward down the left and supported his teammates in attack. Looked bright at both ends of the pitch, placing a superb last-ditch tackle on Bony in the second-half.
The on-loan Manchester City midfielder made his debut just behind the lone striker and he looked tidy, linking up play between midfield and attack and showing some neat touches on the ball.
An all-action performance from the midfielder who put in a terrific shift and covered ground for his side. Wasn't afraid to get stuck into challenges nor spark moves forward and make runs. Superb display from the rookie 17-year-old.
Put in an energetic display but lacked any real quality on the ball, later taken off in place of Lovenkrands as his side searched for an equalising goal late on.
Had moments of trickery on the ball as he cut inside and ran direct at goal, looking decent in the first-half. But faded in the second as Swansea marked their dominance with two superb team goals that both came down his flank.
Preferred to Nikola Zigic in the lone role up front and bagged the opening goal with a fine glancing header into the bottom corner. But he struggled to make any impact in the second-half.
Beaten by a superb glancing header from Novak in the opening stages of the game although not at fault. Wasn't troubled in the second-half as his side were back on top.
Had a fine chance to equalise for his side moments before the interval but missed from just yards out, blazing the ball over the bar. But his defensive contribution was superb, tracking back and putting in some well-timed interceptions.
Looked assured at the back after having to contend with a number of balls into the box from either side but stood up strong.
Knocked a header down across the box only for Amat to miss a sitter from yards out. His overall gameplay was decent although could have benefited from a small gap between defence and midfield.
A decent display from the right-back when venturing forward but didn't have much protection from his wingers when Birmingham often attacked down the left in the first-half.
Didn't stop the cross from Caddis for the opeing goal that came down his side. Looked weak at times with Burke causing problems cutting inside.
He covered ground well and put some strong tackles in for his side but was sometimes left over-crowded against a packed Birmingham midfield that always looked a threat on the break.
Had one of his side's best chances with a first-time shot on goal after a ball over the top, but couldn't control the power on his shot as the ball whizzed over the bar. Involved in the move for the second as he found Bony in space.
Made his return to the side following a spell on the sidelines with a hamstring injury, although didn't quite look up to pace. He fired in the free-kick from deep that resulted in Amat's miss in the first-half but was replaced at the break.
Found it diifficult to find his attacking rhythm in the first-half with Caddis pushing forward and creating width for his side. But he looked far more comfortable with a target-man in Bony to help in attack, assisting the first and starting the second.
Not very effective. Looked a little isolated up top on his own and didn't offer much with his back to goal. Later pushed out wide with Bony taking his role as the lone striker, before being taken off himself as Routledge was introduced.