The Warriors' fate in the T20 tournament isn't in their own hands anymore.
In their previous meeting, the Tigers won by eight wickets, chasing down 138 in 12.3 overs.
Amir was representing Barcelona in the friendly match.
Rossouw blasted his way to a 23-ball fifty during the run-chase.
Gurbaz smashed a sensational 19-ball half-century to steer his side to a huge win.
Even though he picked up a four-wicket haul, Jordan Clark's efforts went in vain.
David Wiese bowled a dream last over in the game against Northern Warriors.
Rossouw said clearly about his preference to play in white-ball cricket where one can earn good money
These players will be crucial for their respective teams.
Alex Hales and AB de Villiers won't be available for Rangpur Riders for the playoffs.