Knights coach Lynn Howells, returning to his old stomping ground, said: "There's not many sides who come to Sardis Road and win but to get a bonus point as well is testament to how we have managed this competition."
The British & Irish Cup semi final draw will be made on Wednesday, March 24.
The 1st and 3rd teams drawn will receive home advantage in the semi finals on the weekend of April 24
A further draw will then take place between the two semi finals to determine which of the potential finalists would be at home in the final on the weekend of May 15.
Scorers: Pontypridd: Try; Nathan Strong; Pens: Kristian Baller(2).
Doncaster Knights: Tries: Andy Boyde (2), Dougie Flockhart, Adam Kettle; Cons: James Brooks(2)