The Trojans played the Dons when they were last in the cup in 2020 and only narrowly lost so they will be out for a bit of revenge when taking them on again in a tie to take place at the Keepmoat Stadium over the weekend of January 29 and 30.
Thornhill earned their place in the second round with a 24-6 victory over a gallant RAF team at Overthorpe Park - and photographer Bruce Fitzgerald was there to capture the action.
Here's a selection of his pictures from a misty but memorable day for the Trojans when Jamie Searby, Declan Kaye, Liam Morley and Luke Haigh crossed for tries and Joel Gibson kicked four goals.
Here's a selection of his pictures from a misty but memorable day for the Trojans when Jamie Searby, Declan Kaye, Liam Morley and Luke Haigh crossed for tries and Joel Gibson kicked four goals.