FLY half Tristan Roberts notched 20 of his side’s points as the Knights bounced back with a hard fought league win to virtually assure their place in the promotion play-offs.
Roberts scored the opening try in the 7th minute and added three penalties and a conversion to give Doncaster a 16-13 interval lead.
Plymouth hit back to level the scores in the 53rd minute before the Knights rallied again to clinch victory.
Star man Roberts kicked two more penalties and substitute Andy Wright crashed over from close in give the Knights the points.
* More on the Knights, including a preview of their derby clash at Rotherham this Saturday, in this week’s Free Press.