Ben Barba failed to fire against his old side as Brisbane opened their account for the NRL season with an unconvincing 10-2 win over Cronulla at Remondis Stadium.
The Broncos got their first win of the year thanks to two lucky second half tries but failed to answer some of the big questions being asked of Wayne Bennett's men.
After the Sharks went into the break up 2-0 following an underwhelming first half, the Broncos got over the line thanks to the rub of the green, much to the chagrin of the 8369-strong crowd.
The Broncos' first try was typical of the game - ugly.
Winger Corey Oates dived over the line after swooping on a Jack Reed offload which appeared to go forward.