Owen Farrell dismissed concern for his wellbeing after he was the victim of a dangerous tackle to the head in England's 39-10 victory over Argentina at Tokyo Stadium.
Eddie Jones' men became the first team to secure their place in the World Cup quarter-finals after posting a third-successive bonus-point win that cements their position at the summit of Pool C.
The match turned when lock Tomas Lavanini became the fifth player to be sent off at Japan 2019 after he caught Farrell on the jaw with his shoulder in the 18th minute.
England score six tries against @lospumas to book their place in the #RWC2019 quarter-finals.#ENGvARG report: https://t.co/GVUadHhpDI #CarryThemHome pic.twitter.com/7g358FIBnb — England Rugby (@EnglandRugby) October 5, 2019
Nine days earlier Farrell was the victim of a similar challenge by the USA's John Quill, who was also shown a red card.
Farrell was treated by a medic on the pitch but alarm has been raised that he was not sent for a head injury assessment (HIA).
"I feel fine. It's obviously concussion that's the worry but I didn't get hit anywhere near the top of the head," England's captain said.
"Maybe your jaw gets a bit sore but I was fine and there was no need for a HIA."
The illegal tackle on Farrell ignited one of several flashpoints in a feisty encounter.
"I probably wouldn't call them fights! There was a lot of stuff off the ball. It's not something we want to get caught up in but we tried to look after our players," Farrell said.
A comfortable victory was marred by Billy Vunipola's ankle injury that meant the number eight was unable to appear for the second half.
Jones confirmed that the joint had been twisted, adding: "We don't think it's too serious."
"Yeah i think he had too much Kobe Beef mate"@EnglandRugby head coach Eddie Jones on his sides performance against Argentina and light hearted response to Billy Vunipola question #ENGvARG #RWC2019 pic.twitter.com/MwC8DHHFnh — Rugby World Cup (@rugbyworldcup) October 5, 2019
A report emerged overnight that Jones was hoping to attend the funeral of his Randwick mentor Jeff Sayle, which takes place in Australia on the eve of next weekend's climax to Pool C against France.
The flight from Tokyo to Sydney takes nine-and-a-half hours and England's head coach admitted the logistics involved makes it unlikely he would be present.
"Unless the RFU hire a concord for me, it'll be quite difficult to go," Jones said.
"I'm negotiating with BA, concord and the RFU to see what we can do. Obviously I'd like to go but I've got a lot of responsibility here. I'm conscious of that.
"The travel makes it difficult so I doubt very much that I'll be going, as much as I'd like to."
England will face Wales or Australia in the quarter-finals depending on the outcome of their clash with France.
"We're just worried about France next week. It's qualification for the quarter-finals but the emphasis is just about getting better for the next game," Jones said.
"When Argentina went down to 14 men, they possibly had a psychological lift and it's human nature that we dropped off a little bit because you think you're going to win the game.
"I was really pleased with how the players came back in the second half and dominated. If you'd have said we'd have 15 points after three games, we'd be pretty happy."
Argentina coach Mario Ledesma admitted Lavanini's dismissal was justified as he counted the cost of a result that effectively dumps the Pumas out of the World Cup.
"It had a big impact because it was early in the game and I thought it was fair. We lost some power in the forwards and that's why we had a very difficult game," Ledesma said.
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