Former All Blacks fullback Israel Dagg has questioned World Rugby’s decision to lower the tackle height for the 2026 World Rugby U20 Championship.

The global body confirmed this week that the tournament will be played under a reduced tackle height law, with contact required below the sternum.

The move marks the most significant step yet in a trial that could eventually be adopted at all levels.

Speaking on Sport Nation’s Scotty and Izzy show, Dagg said he understood the motivation behind the law change, particularly in light of recent head-injury incidents, but questioned how easily players and officials would adapt.

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“You feel for the big men, particularly the South African locks, who are already struggling to get low,” he said.

“We’ve got to try and change the way that we approach the game defensively and now teams are going to have to adapt and adjust, and look for certain ways to try and dominate the tackle.

“The way that I played, and a lot of teams play, you’ve got one low and one high, and now there’s going to be a lot of concern for that player coming up high.”

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Dagg admitted the adjustment could lead to uncertainty, particularly in the early stages of the trial.

“It’s probably going to be confusing as hell because, like everything and every change, there are going to be moments out there where you’re thinking, ‘what the hell is going on? Why is that decision being made?

“Hopefully there’s some common sense prevailing in this, but I’m for it,” he added. “I think it’s a good opportunity to make some changes and potentially help some HIAs and head knocks.”

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Photo: Timothy Rogers/Getty Images

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