England could incur the wrath of the disciplinary process themselves after Piers Francis was cited for clattering into Will Hooley in Thursday's 45-7 victory over the USA.

World Rugby has adopted a zero-tolerance approach to high challenges in a drive to protect players from head injuries and have even gone as far as criticising the performance of its referees in Japan after Reece Hodge escaped a certain red card.

Daly, who started the Pool C wins against the USA and Tonga, insists the motivation when attempting a tackle must be always be to ensure they are legal regardless of the game's quest to reduce concussion.

"The way it's going now you can't be thinking about tackles. You don't mean to hit people there if you do hit them there," Daly said.

"It hasn't changed that much in my eyes – you want to make good tackles and that's all you ever really want to do. Sometimes you slip up and you'll get deemed high tackle now.

"You can't really think about it, you've just go to do what you do and try to tackle properly.

"It's safer for the game and any rule that comes in you have to abide by it and this one is for the safety of us and everyone around us.

"It's just something you've got to be way of, any rule that comes in, especially this one at the moment. But it doesn't change things too much day to day."

Following 48 hours off for the players, England swap Kobe for Tokyo on Sunday as they turn their attention towards the first of two pivotal Pool C matches after dispatching Tonga and the USA.

The outcome against Argentina and France will shape the group's final reckoning.

"I wouldn't say it's a pool of two halves but we are two games down and there's a big break until the next game," Daly said.

"To get 10 points out of the first block was good and we'll go into Argentina now raring to go.

"Argentina are going to come out very passionate, they always are. They've got a good record in the World Cup as well so we'll be definitely wary of that.

"They've got a very good forward pack but some good backs as well. We've played against them a couple of times in the last couple of years so we'll see if they are doing anything differently at the World Cup.

"But we'll be focusing on ourselves mostly just to try to get our game up to where we want it to be."