Cardiff City romped their way to a thumping South Wales Derby win over Swansea City at the Cardiff City Stadium on Saturday.

Callum Robinson's brace and a thundering header from Dimitrios Goutas was enough to seal a second straight home derby win for the Bluebirds, and condemn Swansea to a sickening defeat that will put further pressure on boss Luke Williams, whose side struggled to show even a shred of the sort of intensity that's so often underpinned their success in this fixture.

There were also several key moments that might well have crept under the radar on the day. Here's a quick look at just a few of them.

READ MORE: Luke Williams slams 'pathetic' Swansea City players for role in Cardiff brawl

READ MORE: Omer Riza's sacrifices for Cardiff City in father's final hours emerge

What happened after the final whistle

Emotions run high on derby day at the best of times, but the mass brawl that broke out after the final whistle was up there with the most memorable melees to have graced this fixture.

It's not quite clear what exactly sparked it all, but it appeared to snowball from an exchange between Cardiff's Yakou Meite and Swansea's Myles Peart-Harris, and then morphed into this heaving homogeneous mass of jostling limbs, with both sets of players and members of staff involved.

From a Swansea point of view it felt a little performative. A point touched on by boss Luke Williams, who understandably questioned why he side couldn't display the same level of fight during the game itself. You can read his strong reaction here.

Williams, understandably stony-faced, did his best to diffuse the situation, all while feeling the heat from an away end that showed little hesitation in displaying their own anger and frustrations.

Emerging from it all, a beaming Callum Robinson, who in the midst of the chaos saluted each corner of the Cardiff City Stadium, before being whisked away by the television cameras. With the brawl now starting to die down, he went back out there, jubilantly clutching his Man of the Match award.

It's perhaps worth acknowledging there's every chance this episode of mass handbags may well have been related to a previous flashpoint involving Goncalo Franco and Omer Riza, with the Swansea midfielder making little attempt to prevent himself from bumping into the Cardiff boss on the touchline as the ball went out of play.

Riza was incensed, convinced Franco had clattered into him deliberately, and was sent off for entering the field of play to confront the Swans star.

On a day where emotions were already running high, this took things to a whole new level.

Cardiff shows its support for Riza

Riza had to be wrestled down the tunnel after being handed his marching orders, in a scene that resembled an unruly punter being forcibly tossed out of a busy city centre bar on a Friday night.

Looking back on it, the Cardiff boss might be disappointed he didn't keep his composure, but the standing ovation that greeted his enforced exit was a poignant reminder of the emotions that have swirled around him and the club over the last few days.

The passing of Omer's father Josh on Thursday rocked Cardiff's preparations for this fixture, and there was plenty of of shows of support for the boss throughout the day.

Even on the march against Vincent Tan, one fan held up a placard in support in support of the manager reading "We're all with you gaffer", while the players themselves wore black armbands for the game.

And, shortly before Riza was sent off, the Canton End broke out with a chorus of "This one's for your dad" in a moment that would certainly have moved the Bluebirds manager.

Amidst all the fire and passion of derby day, this was a nice and wholesome reminder that there are things in life far, far more important than 22 men kicking a ball around for 90 minutes.

The moment that tested Cardiff's resolve

Swansea didn't show anywhere enough fight on the day. To a man, they were simply nowhere near good enough by any possible metric.

But there were a couple of moments where they did threaten to show some sort of interest in coming to the table, particularly in the opening half an hour.

Harry Darling, whose fitness was the subject of plenty of speculation in the week, did his best to convince the travelling Jacks that his side were up for it, going in on Ollie Tanner with a crunching, but fair, tackle on 30 minutes.

Tanner looked in some pain, and his shinpad was sent flying by the challenge.

At that point, one must have wondered if it might just be a moment that would set the tone for another Swans success in this fixture, particularly after Callum O'Dowda had been forced off with an injury early on.

So many have questioned Cardiff's appetite for this fixture, but it was there in bucketloads on this occasion.

Tanner, so often a thorn in the side of the Swans, was of course at the heart of what was a brilliant opener just after the break, putting in a cross that was superbly controlled by Robinson, who then converted to send the home fans into raptures.

From that point on, this was Cardiff's derby to lose.

West Brom saga continues to loom over Williams

Make no mistake, Williams is now firmly under pressure after this fiasco.

Their meek showing at the Cardiff City Stadium is the latest episode in what's been a very difficult couple of weeks for the Swans boss.

The rumours linking him with the job West Bromwich Albion have, it seems, largely derailed what had previously looked a promising spell, particularly on the back of those two consecutive home wins over Christmas.

Having started the year with a heavy defeat at the hands of Portsmouth, Swansea edged their way to a draw with, coincidentally, West Brom, before being thrashed by Southampton in the FA Cup.

Despite finally putting the rumours to bed, it feels like the whole episode put a substantial dent in the goodwill between Williams and the fans, who in the last four games in all competitions have seen their side concede 11 goals.

“I don’t know because no one’s mentioned that to me," Williams said when asked if the rumours have played a part in Swansea's recent nosedive in form.

"I’m more than happy to take the blame if that is it but I’m not sure. It looked to me that certain players are unable to perform in certain situations.”

There are certainly some mitigating circumstances. For one, this squad isn't anywhere near as good as some have previously made out, and an injection of quality in January is an absolute must.

But regardless of what happens in the transfer market, Williams simply has to mastermind some sort of response.