Ashdown had to step in for Marcus Hahnemann at the last minute when it emerged that the bald American would not be fit to play.
However, the 21-year-old put in a solid performance, making one good save and maintaining a clean sheet.
The rookie shotstopper, who recently completed a month on loan at Bournemouth, was satisfied with his performance and pleased that the side chalked up another three points.
"It was a good win. Basically we held on in the second half and we did well,"said Ashdown, speaking to readingfc.co.uk.
"I wasn't really troubled although I had one good save to make. I just tried to tip it around the post and managed to do so.
"We were under pressure a little in the last fifteen minutes until the third goal went in. That was a bit bizzare - I wouldn't like one of them to happen to me."
Despite putting in a decent performance, Marcus Hahnemann is expected to return to the side for the visit of Ipswich on the 19th October.