Babina Noko are enjoying another good run in the Betway Premiership this season, in third place on the standings with 32 points from 18 games, just six points adrift of league leaders Orlando Pirates.
They overcame Highbury FC 1-0 in their last 32 clash and now take on TUKS, who saw off Hungry Lions 5-4 on penalties after a 1-1 stalemate.
Speaking ahead of Sunday's clash, Tinkler called on his team to have a "strong mindset".
He said on IOL: "I explained to the players prior to the Highbury game that complacency is the biggest threat.
"Sometimes, as I have mentioned before, when I start talking to the players about it, then it happens.
"I thought we were complacent against Highbury. We have to go into the game against TUKS with a completely different mindset. We should know that we are better than them."
"I said to the players right at the beginning of the season that to compete at the highest level, clean sheets are the most important factor and goals will come," Tinkler added.
Sekhukhune most recently reached the Nedbank Cup final in 2023 but lost 2-1 to Orlando Pirates.
Richards Bay head coach Papi Zothwane is bracing for a stern test when his side takes on neighbours AmaZulu in a Nedbank Cup Round of 16 clash at the Umhlathuze Sports Complex on Friday night.
With the quarter-finals of the Nedbank Cup in sight, AmaZulu head coach Arthur Zwane believes his side's growing character is a positive sign of a successful season in the making.
Renaldo Leaner believes Sekhukhune United can realistically challenge for both the Betway Premiership title and the Nedbank Cup this season.
We take a look at five talking points from the Betway Premiership action last week where Orlando Pirates extended their lead at the top of the table.
