Of all the clashes in tomorrow morning's match between the Stormers and Blues in Cape Town, few are likely to have the impact and velocity of the contest between captains Duane Vermeulen and Jerome Kaino.
Both will start at No8, both are on the verge of celebrating significant milestones, and both have a reputation for hitting like runaway cement trucks.
Vermeulen, 28, will celebrate his 100th Super Rugby match when he leads his team out on to the Newlands ground in Cape Town. For 31-year-old Kaino, it will be his 99th match.
Vermeulen, who made his Springboks debut in 2012, forced himself into the New Zealand rugby public's consciousness last year with his outstanding efforts in the two tests against the All Blacks. It was a wonder how Richie McCaw got to his feet after a Vermeulen hit early in the tight Wellington test won 14-10 by the All Blacks and he was the man of the match in the Boks' 27-25 victory in Johannesburg.
A nominee for the IRB's Player of the Year won by All Black Brodie Retallick, Vermeulen, who began his Super Rugby career at the Cheetahs, comes across as a fairly straightforward character.