Sutton coasted to a 3-0 lead at half-time lead with excellent finishing from Imogen Fisher and Hayley Chatwin (2)
The second-half was more even with chances at both ends and Coundon coming more into the game, with Sutton failing to capitalise on opportunities to extend the lead with Niamh Deasy and Imogen Fisher going close
In the 81st minute a high Coundon cross found its way into the far corner of Sutton's net and in the 90th minute Coundon scored from a good shot from outside the box
Player-of-the-Match was centre-back Sophie Levick who had an outstanding game
Manager Andy Burman said "The first 45 minutes was some of the best football we have played and deserved to be well ahead. Towards the end we had some lapses in concentration but we are in the hat for the next round"