The South Wales derby began with a spell of dominance for the away side who illustrated their intentions right from the off. The attacking mentality paid off for Roberto Martinez with Nathan Dyer, on loan from the money stricken Southampton, poking home from close range following a clever Jason Scotland flick on.
However, following the goal it was Cardiff who looked the more dangerous of the sides, pushing on with real intentions to get back Martinez's men. A quality passing move in Cardiff's midfield led to Chopra controlling and dribbling the ball past a downed Ashley Williams, only for the former Sunderland striker to hit the foot of the post.
Nonetheless, Cardiff didn't stop there, generating chance after chance. Ross McCormack's right footed free kick needed a two handed save from Swansea
'keeper Dorus De Vries and when Paul Parry's close range follow up missed the target, it looked like it might have been one of those days for the Bluebirds.
In the second half, Cardiff's dominance continued and Chopra finally squared
things up in the 54th minute as a result of an unselfish Jay Bothroyd pass.
At 1-1, the tie calmed down and both sides seemed fairly happy with a point.
But the action was far from over and with only two minutes remaining, Swans
substitute Joe Allen fired in a shot from outside the Cardiff penalty area.
Swansea thought they had won it but with an extra striker in the shape of Eddie Johnson brought on, Cardiff's late push lead to a dubious penalty.
Young Scottish forward Ross McCormack slotted home the spot kick to equalise once again.