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
Apple growers warn curbing immigration could be 'disaster' for industry
The decision to leave the EU could have a profound effect on millions of children who weren't able to vote. So what do they think?
Monday Evening's Pollen Forecast