The City manager also praised the performances of midfielder Jack Finch and striker Gary Madine in the 2-2 draw at Orient...
Coventry City manager Steven Pressley admitted his frustration after the 2-2 draw against Leyton Orient at Brisbane Road.
Jim O'Brien put City ahead, before goals from Scott Cuthbert and Jay Simpson put Orient in front. O'Brien then popped up in the last minute to level the scores.
The City manager believes the Sky Blues should have claimed all three points and has urged his side to correct their set-play errors.
Pressley said: "The truth is that we're frustrated with that result. We dominated large parts of the game and had so much control.
"It was a cagey opening 15 minutes but after that, we dominated the first half and deserved the lead. After the break, we dominated again but we were undone by two set-pieces.
"Lee Burge has hardly had a save to make all game but we've got to deal with set-plays better, especially the second one as it went into the second phase and didn't deal with it.
"It was hugely frustrating to find ourselves behind but I said to the group in there, good teams score late goals and we continued to push. We deserved to get back level as we went until the end."
Jack Finch and Gary Madine both started in three changes for the Sky Blues today and the City manager praised the duo's performances.
"We've got to begin to turn these good performances into winning performances. I thought the game was there to win so we're disappointed.
"There were plenty of impressive performances but I've got to single out Jack Finch who I thought was brilliant today.
"For an 18-year old to come into that type of game and play like that, it was brilliant. That's the first game he has started in central midfield and you wouldn't have known.
"Also, Gary Madine made a big difference to us today as he gave us that physical presence we've lacked in other games so it was really encouraging to see."