Coetzee announced that Michael Rhodes, Juan de Jongh and Jaco Taute have all made successful recoveries from injury and had resumed full training.
"That's a good thing that we can welcome back players from injury, although it has given us a selection headache," he said.
"They've all been training well and I'm not sure who will be in the team.
"We need to plan things 100 percent correct because it is such an important home game for us. We need to pitch with our A-game."
Reserve flyhalf Peter Grant injured an ankle at training last week and will undergo a fitness test on Tuesday.
De Jongh (centre) and Taute (fullback) will make the run-on XV in the place of Damian de Allende and Joe Pietersen respectively.
Coetzee was likely to use Pietersen in the vacancy left by the injured wing Bryan Habana which would ensure the Stormers still had their most reliable place-kicker to call on.
De Allende made huge progress since making his Super Rugby debut a month ago and he is equally at home on the wing but it looks like he is doomed for a spot on the bench on Saturday evening.
Coetzee said wing Gerhard van den Heever also had strong selection claims to the starting XV.
"The big one will be whether I start with Gerhard van den Heever on the wing and continue with Joe Pietersen at fullback, or bring Jaco in at fullback and move Joe to the wing,” Coetzee said.
The clash at Newlands kicks off at 19:10 on Saturday.


