"We steeled up late in the second half [against the Stormers] but we're going to have to be good against the Sharks," Rennie said. "They've got an outstanding scrum as well so it'll certainly be an area they'll target, we think."
There was little to suggest the Chiefs scrum would be the target of opposition sides ahead of the trip to the Republic. The set piece had performed capably earlier in the season, even excelling against the Highlanders, but South African sides always provide a different challenge.
In any case, as the Chiefs have discovered, the winning of the match is not necessarily done at scrum time. That solid scrum when they faced the Highlanders couldn't save them from defeat, while last week's average effort against the Stormers didn't prevent them from earning the victory.
Instead, it was a poor attack that felled the Chiefs when they faced the Highlanders and, equally, it was their sparking attacking play that produced victory a week later.
With the aim of maintaining that form, changes to the backline were kept to a minimum for the encounter with the Sharks, with a new midfield combination of Seta Tamanivalu and Andrew Horrell replacing the injury-hit Tim Nanai-Williams (broken finger) and Sonny Bill Williams (concussion).
Williams has been symptom-free for most of the week and would have been touch-and-go for the game but, with plenty of cover in the midfield stocks, the Chiefs opted against risking him.
In any case, tomorrow's game may not call for the competition's leading off-loader, with the heavy humidity in Durban creating difficult conditions and potentially limiting the expansive nature of the Chiefs' attack.
"It's almost like playing in drizzle and it's probably a reason why the Sharks kick the ball a fair bit," Rennie said. "We also want to play a bit of territory but we're keen to use the ball when it's on. You just have to be really accurate in regards to your skillset in Durban, because the ball does tend to be slippery."