McDermott felt his side were not at their best until the second half.
"First half we were a little bit too respectful, in the second half I thought we deserved to win," he said.
"In any sport what you need to do is stay in the game, I just said (at half-time) that you are right in the game at 1-0 and if we can raise our tempo and play the way we can it will give us an opportunity.
More top news
Holly has your pollen forecast for the east and west of the region.
The authorities in Salisbury hope to reopen 'The Maltings' shopping area which was closed after a nerve agent attack on a former Russian spy
The Duke and Duchess of Sussex will attend a Buckingham Palace garden party as part of the Prince of Wales’s 70th birthday celebrations.