Johannesburg - Kaizer Chiefs coach Vladimir Verzemovic is expecting a real test when his team face in-form Mamelodi Sundowns on Saturday.

Both side's trail leaders SuperSport United by six points in the PSL standings and the Serbian mentor knows that defeat for either side could spell the end of their title challenge.

The Amakhosi boss is all too aware of the task his charges face against a Brazilians side who he rates as having the best players in the league.

He told Football365.co.za: "It's a massive game. Sundowns are a big team and it is always a pleasure to play against them.

"I need to make some psychological preparations for the match because Sundowns probably have the best players in South Africa."

Verzemovic will hope to have the inspirational Siphiwe Tshabalala raring to go following continuing concerns over his fitness.

The Bafana Bafana star has been substituted in recent matches in a bid to avoid injury as his coach attempts to make sure he completes the entire season.

"He missed pre-season and because there are so many games close together, it's very important that we have him fit and protect him from injury.

"Most injuries happen towards the end matches so that is why he has often been substituted. He is our star so it is crucial that we have him on the pitch," he concluded.