Duffy, who moved to Rovers from Swansea City in a £100,000 deal earlier this summer, scored the opening goal against the Blue Square Premier League side.
"It was a perfect goal and something we hope to see on other occasions in the future," said Trollope
"It was good to see him get off the mark early on. He was suffering a little bit of stiffness because I think he's found my training methods a bit intense, which a lot of new players do. But he gave a good account of himself."