"It was well documented that if the Springboks had a weak part, it was their scrum. The Beast - as they've named him - isn't a great scrummager... and I think the Lions knew that they held the upper hand there.
"I don't know whether they [the Lions] worked on it hard enough, worked on their strengths in the first Test, which, really, looking back on the series, is where the series was won - in that first 20 minutes in Durban.
"And it was poor selection as proved Saturday when the Lions got the selection right with Matthew Rees and Adam Jones there at two and three.
"That allowed the Lions a platform and it's a missed opportunity. I'd put the Test series down to poor selection in the first Test."
Jones was among the walking wounded in the wake of the 28-25 second Test defeat, the victim of the challenge that led to Springbok second-row Bakkies Botha being cited and banned for two weeks for dangerous charging.
However, the most controversial incident took place in the first minute when Schalk Burger was sin-binned for eye-gouging wing Luke Fitzgerald.
De Villiers wrong on Burger - Shanklin
The flanker has since been banned for eight weeks following a citing hearing.
Having been the victim of a similarly infamous incident himself, in the opening World Cup game against Argentina in 1999, Jenkins says French referee Philippe Berdos and touch-judge Bryce Lawrence should have acted more strictly in Pretoria.
"It was certainly a physical game, wasn't it? The intensity was over and above what we've seen in recent times," said Jenkins.
He added: "The South Africans have always been very physical in their 120 years of rugby history, but on Saturday it was real boundary stuff.
"I just think some times things are done in the heat of the moment.
"I know Schalk Burger's very physical and there's no place in the game for gouging.
"He [Berdos] should have issued a red card and Bryce Lawrence... should have been as authoritative in insisting it was a red card to the referee as he was implementing the scrum tactics the week before in Durban when he penalised the Lions off the park.
"But I just think it was weak refereeing and it was very costly to the end of the game to the Lions."
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