“This stage is where we will be tested,” said Johnson.
“You can either play or you can’t.”
Matsatsantsa overcame Botswana side Gaborone United 3-0 on aggregrate in the preliminary round of competition and they will be looking to replicate that performance.
United’s depth has been a critical point of interrogation since the team are participating in three competitions simultaneously.
Besides their quest for African glory, the Pretoria side have pitted against Moroka Swallows in the Nedbank Cup and, with less than three months left of this season, the team will have to give 110% concentration to their Premier Soccer League progression.
But Johnson said the team’s ambitions are an open secret.
“We need to be at our very best,” he said.
“It’s a big stage for us and we have to come to the party and showcase what we can do. Leopards are a formidable side and are well known for producing some of Kenya’s best talent.
“We are well aware of what they can do and we have planned accordingly for them.
“We want to progress to the next stage and have made our intentions very clear to everyone.”
United will miss the services of Roscoe Pietersen, Bradley Grobler and Edwin Gyimah due to injury.
Leopards have had a somewhat turbulent start to their campaign but managed to beat Ethopian outfit Defense SC for a 4-1 aggregate victory.
United skipper Bevan Fransman said the team will need to put their best foot forward as they did in their last encounter.
“We did well in our last game, and we have every intention to carry on with that same mindset.
“All we need is to ensure that we get a favourable result,” said Fransman.
Kick-off is at 8.15pm.