Both teams are precariously placed at the bottom half of the points table.
The Sixers' task against the Riders won’t be easy despite their opponent blowing hot and cold.
Rossouw was stranded on 44 runs from 46 deliveries.
Although the business end is still some distance away, Rangpur will have to start sorting their problems out to pick some momentum before the big games come their way.
Off-spinner Aliss Islam picked up a hat-trick on debut.
The Jessore-born speedster was the Player of the Match for his stupendous spell of bowling.
The Titans stuttered in the second-half of their run chase.
Rangpur Riders are expected to bounce back with a convincing win over the Khulna Titans.
The Riders lost their opening match against Chittagong Vikings.
The encounter went right down to the last over.