Dunne bemoans 'clinical errors'
Goalkeeper Simon Mignolet is convinced Sunderland have more than enough to drag themselves well away from the relegation zone come the end of the season.
The Black Cats sunk to a 3-1 defeat at bottom club QPR to become embroiled in the struggle for survival.
But Belgium goalkeeper Mignolet is convinced Sunderland's home form will garner enough points to hit the magical 40-point mark before the current campaign ends.
"We have to look forward and it is important we do that rather than talk about the last couple of games," he said.
"It is important to look upwards and ourselves, to make sure we are ready for the game. We can still end up where we want to be - there's a lot still to play for.
"There's three points up for grabs this weekend and we need to make sure we (get them) and then end the season on a high."
Manager Martin O'Neill has highlighted the importance of getting back to winning ways as soon as possible and Mignolet added: "We have to make sure we're up for it.
"At home, with the crowd behind us, we can get the three points... We can't over-think things. The solution is within ourselves. We need some wins and we have enough ability in this squad to make it happen."
The U's led 2-0 going into the last 15 minutes at the Ricoh Arena after goals from Gavin Massey and Michael Smith, but ended up having to settle for a point after the Sky Blues staged a late fight back to draw 2-2.
Dunne did not appear at the post-match press conference on Tuesday night, but told the Daily Gazette: "We were comfortable and Coventry got booed off at half-time.
"We dealt with their threat and got two goals into the lead. But we then made two clinical errors - we got caught out with the first goal and then we gave a silly free-kick away.
"But we will take the point and move on and it could have been worse, we could have lost.
"Everyone will be saying that it was two points dropped but that's not necessarily the case.
"We don't have time to feel sorry for ourselves, we have to push on."
Colchester are four points above the League One relegation zone but the three teams immediately below them all have games in hand.