Was given no help by his team-mates for any of the Southampton goals as he was left completely exposed. Looked rash in a couple of his decisions on coming for loose balls in the second period and almost made to look foolish by Shaw late on.
Caught out hopelessly for the opening goal and his positioning was a constant problem for the former Tottenham man, leaving Lambert with the freedom of the box to slide home the third after losing him at the corner.
K. Théophile Catherine
Lost Rodriguez with worrying regularity in the opening period, emphasised by the space the Engliand striker found for his second goal. One of the better performers in the second period in a red shirt, clearing well to deny Schneiderlin and getting forward when other heads had dropped.
Stretched down the left on a regular basis by Southampton's attacking trio. Things didn't get any easier in the second period as Shaw began to get forward and though Taylor didn't have any answers, Mackay did, bringing on youngster Declan John.
Not switched on at all in the opening periods as the Cardiff defence capitulated to let in three goals in the space of 13 minutes. Improved in the second half, alert to make some important clearances, but the damage was already done.
Consistently threatening when delivering set-pieces and crosses into the box but struggled to make his mark from open play, most notably when fluffing his lines at 0-0 when it looked easier to hit the target.
Rarely sighted on the attack for the home side as they offered very little from open play. Was rushed when in possession and didn't ever get the chance to find the ball in space, arguably down to Southampton pressing rather than Cardiff's ineptitude.
Involved in a running battle with Luke Shaw all afternoon as the pair constantly snapped at each other's heels and easily came off second best. Tried his luck on the opposite flank but still no joy up against Chambers.
Redundant in midfield as Cardiff found themselves overrun. Couldn't impose himself on the game as Southampton stifled the life out of the midfield. Was taken off for Kim in the second period.
Playing two up top didn't ever look like working for Cardiff and the work-rate of the Nigerian certainly saw to that. While Campbell darted and hustled, Odemwingie waited for everything to fall for him. Even when it did he never made anything of it and his substitution at the break was a necessary one.
Left to feed off scraps, chasing long balls in vain and endlessly hurrying the Southampton defence but to very little avail. Easily the best performer for his side but couldn't cap it with a goal, sending his only effort of the game sailing over the bar.
Showcased his erratic form once more with some fine saves mixed in with moments of madness. Never looked comfortable with Whittingham's devilish deliveries but still came away with his first cleansheet as a Southampton keeper.
Involved in a head-to-head with Noone that saw the left-back come out on top. Was booked for a tackle on his nemesis for the day but did little wrong apart from that, causing problems at the other end with dashes beyond the front three.
Doesn't start often for the Saints but never looked out of place as he constantly thwarted the home side when they threatened, however rarely. Was perhaps lucky not to be booked for clip on Campbell.
The youngster doesn't look out of place at all in the Premier League and he continued to shine here, getting forward down the right where possible and keeping Much extremely quiet.
What Cardiff did manage to conjure in attack was constantly dealt with by Fonte and his centre-back partner. Important blocks and tackles prevented meaningful efforts on Gazzaniga's goal throughout the 90 minutes.
The Saints look a lot more settled with the Frenchman back in the middle and his passing today was key in setting up counterattacks. Sat in front of the back four but did allow himself the odd run forward, only to be denied a goal by Theophile-Catherine's clearance.
Confidently strode forward when he could, taking on anyone in a red shirt when given the opportunity. Produced a wonderful assist for Rodriguez and looked every bit a World Cup player in Wales today.
Crisp passing from the Northern Irishman meant a slicker link up between the front and middle three. Got beyond them when he could but the job he did on Gunnarsson in the middle was key.
Perhaps the least prominent of the front-six for Southampton but by no means a poor display. Was all over the park, closing down Cardiff, but his sense of urgency let down his passing every now and then.
Having one of, if not the best, seasons of his career, and continued his fantastic campaign today with two well taken efforts. Posed a threat throughout and never switched off in search of his hat-trick, which unfortunately for the England striker, never came.
Continues to deliver top-drawer performances at this level as if it has been something he has been doing all his life. Showed great vision for Rodriguez assist and his poaching skills where on show for his own effort.