The Bucs host The Brazilians in a highly anticipated Absa Premiership fixture at the Orlando Stadium, with kick-off set for 19h30.
Sundowns come into the clash on the back of three consecutive losses, but Qalinge refuses to read much into their slump as he believes Pitso Mosimane's side will come out guns blazing in order to restore their pride.
"Sundowns is a very big team and they play a good brand of football. Looking at their last three games, they've lost so they won't come here and just walk on the field," said Qalinge.
"Obviously they're coming here to win the game and get a positive result, so we can't expect a walk in the park – it won't be an easy game.
"Coach Pitso is one of those coaches who don't want to lose any games, especially big games, so we're expecting a tough fight."
With Downs' slump having started with a 2-1 defeat against Kaizer Chiefs a fortnight ago, 'Section' hopes they can complete a Soweto double over the Tshwane giants.
"I can't say much about Chiefs, they managed to get their three points [against Sundowns] so I'm hoping we'll do the same and just get our three points," he added.
In their two meetings last season Sundowns walked away 2-0 and 6-0 victors so, with that in mind, Pirates will look to inflict more agony on Mosimane and his troops this evening.