"We have two guys who have been stalwarts for the Stormers. Peter Grant, in my view, is probably our best player this year. He's been fantastic, he's won us games. He won us the game against the Sharks here at Newlands by kicking that penalty.
"Dewaldt [Duvenage] has been a consistent player throughout, and he is a leader within the squad as well. We have put a lot of confidence in them.
"They've been good for us, and hopefully they can put up a good performance on Saturday."
A number of poor displays by Bok No10 Morne Steyn in recent weeks could make coach Heyneke Meyer reconsider his five-eighths selection, and with Patrick Lambie still struggling with an ankle injury, Grant could be his man.
"Peter's got to keep playing the way he has played for the Stormers. By fulfilling his role, he is making a [Bok] statement in any case," Coetzee said yesterday. "He's got to keep marshalling, give us direction, knocking them over when the opposition gets penalised. Defensively, he has always been strong, and that is what we expect Peter to do.
"But again, it's a massive team effort, and that is why this team has been renowned for their commitment to each other and playing as a team."
The Stormers were dealt a significant blow when Duane Vermeulen failed to recover sufficiently from his knee injury, which sees Deon Fourie continue at No8 in the semifinal.
Vermeulen's size would've been valuable against the big Sharks runners such as Willem Alberts, Ryan Kankowski and Bismarck du Plessis.
"We are taking it one day at a time. Duane has shown great progress, like I said - 60 to 70 per cent. Obviously, he hasn't kicked on from there.
"I said it from the word go - I believe in playing 100 per cent fit players, and this is no different. Deon Fourie was Man of the Match in the last game, and I'm sure that he can do the job for us. Deon is really an energetic player, is all over the field and has an engine. He is an incredibly hard worker, and he is very good on the ground.
"Duane obviously brings something else, but I think we've coped throughout the season up until now. It's another opportunity for Deon to show his versatility in quite an intense and high-quality game."
Coetzee said that Brok Harris' experience of playing in previous Super Rugby playoffs won him a start at tighthead ahead of youngster Frans Malherbe, who is joined by another prop on the bench, Deon Carstens.
Meanwhile, the Sharks have lost classy young centre Paul Jordaan to a hamstring injury, which sees Tim Whitehead move from No12 to No13, and Meyer Bosman come in at second five-eighth inside centre.
Powerful ball-carrier Jean Deysel has been recalled to the bench, with fullback Riaan Viljoen.
