Harry Maguire believes Manchester United made three mistakes as they drew with Burnley at Turf Moor on Tuesday night.
United took the lead through Paul Pogba and could have had a more comfortable lead if not for two disallowed efforts in the first-half.
Ralf Rangnick's side continued to dominate the match but would pay the price for failing to get a second-goal when Jay Rodriguez levelled things up after the break.
With the scores level United still squandered further chances to win the match and Maguire believes his side need to be less sloppy if they are to achieve their targets this season.
"I think you saw the first half. We had control," he told BT Sport. "We have got to win the game with the amount of chances we created. We had to get that second goal. Two points dropped.
"We wanted to dominate the game but for sure when you come to Burnley away you are not going to dominate for 90 minutes. We had to see it out better. We conceded like against Middlesbrough when they had that spell of pressure. We have got to be that bit more clinical.
"It was a disappointing goal on our behalf to concede. We came out in the second half a bit sloppy. We had long enough in the game to come back from that and try and find the winner.
"We demand on ourselves to win the football match so it is disappointing."
