The battle on the edge of the park might be the most intriguing part of the weekend's England-New Zealand rugby test with Fiji-born winger Semesa Rokoduguni named to make his English debut at Twickenham.
The 27-year-old army corporal will play on the right wing and will mark the the prolific try-scorer Julian Savea who has scored eight tries from just four tests against England.
England coach Stuart Lancaster says he is delighted for Rokoduguni and says he has confidence in the Fijian flyer as he has topped the stats in virtually every category this season and looks ready to play.
But Julian Savea has sent an ominous warning, saying he feel's unstoppable.
In Rokoduguni England think they have the answer to Savea, though the latter is brimming with confidence and says he's yet to reach his potential.
"As players we want to improve every week. It's all about confidence. I guess when you find that and you get into your stride, you feel unstoppable. I guess it's a good feeling in terms of mentally, if you get that feeling you just keep going. Every one of us always wants to get better, always wants to be the best in our position."
Savea has 29 tries from just 30 tests for the All Blacks. Rokoduguni has only played two years of professional rugby.