Instead, Sexton was the player under fire as the veteran number 10 milked the tackle.
Reacting to the incident, one fan wrote: "Sexton play acted a head injury. Blatant cheating."
A second wrote: "That Liam Williams yellow card shows why rugby will be dead in a few years - nothing wrong with Liams body shape and Sexton play acting sums up how rugby has drastically changed for the worse. It's a mockery to the real injuries."
Another commented: "Sexton winks after getting another fellow professional a card by his simulation of injury and as always gets up to take the resulting penalty. This will destroy the spectacle that is International rugby."
A fourth said: "Another football injury/tactic from Johnny Sexton. He does it too many times."
Another wrote: "This is some pretty poor rugby from Wales. But Sexton selling the head injury is low."
Williams tackle on Sexton:
#3. Liam Williams dive
The Wales fullback hit the deck pretty dramatically after the littlest of contact from Ireland lock Iain Henderson.
One fan wrote: "Liam Williams going for a career change in acting."
Another said: "Liam Williams.... I've seen better acting on stage!"
A third wrote: "Liam Williams been hanging out with footballers?"
"For a hard man ex-scaffolder - Liam Williams folded himself up like a deckchair at the slightest of touches. What a dirty diving cheat!!!" commented a fourth.
Another said: "Can somebody tell Liam Williams it’s not soccer he’s playing. Gobshite"
Liam Williams dive:
#4. Farrell smiling at Russell
England captain Owen Farrell was seemingly lucky to avoid punishment for what appeared a high late tackle on Scotland star Finn Russell.
However, that meant there was only more room for Duhan van der Merwe's to score a famous double which handed Scotland back-to-back wins at Twickenham for the first time
Owen Farrell late tackle
One fan wrote: "Huge hit by Farrell. Probably a bit high mind."
Another commented: "Farrell plays right on the edge. That looked naughty."
A third said: "Under the new RFU rules that would be a straight red."
#5. Andy Farrell's controversial gift
Owen Farrell expressed his dissatisfaction in an interview with The Times over Andy Farrell purchasing Ireland jerseys for his kids ahead of the 2023 Six Nations.
England coach Steve Borthwick retained the Saracens fly-half, who missed the entire 2022 Six Nations, as captain after naming his first squad.
That means Farrell will once again come toe-to-toe with his Dad Andy, who is the head coach of Ireland.
Farrell said: "My eldest has an Ireland shirt. I asked him why he has got one. He said, ‘It’s grandad’s team’ and I said, ‘You can wear a suit like grandad does, then, not the kit.’ They’re into anything sporty and my dad got them a Manchester City top which I’m not happy about as well.
Finn Russell qui va se foutre de la gueule d’Owen Farrell en plein pendant l’essai fou de Van der Merwe parce que l’Anglais n’a pas plaqué l’ailier adverse.
Du Finn Russell tout craché.
🗣️ "My eldest has an Ireland shirt. I asked him why he has got one. He said, ‘It’s grandad’s team’ and I said, ‘You can wear a suit like grandad does, then, not the kit.’ "
Owen Farrell interview | ✍️ @willgkelleherthetimes.co.uk/article/owen-f…