Ralf Rangnick criticised the decision-making of Manchester United forwards Jadon Sancho and Anthony Elanga after their 1-1 draw with Leicester.
Sancho snatched at a chance in stoppage-time when Leicester centre-back Wesley Fofana slipped while Elanga was carelessly flagged offside when Marcus Rashford was approaching the six-yard box and shaping to shoot at Kasper Schmeichel.
Elanga and Sancho both started ahead of Rashford, who was introduced early in the second-half at centre forward, where playmaker Bruno Fernandes lined up in a strikerless formation.
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United have won eight of their 16 Premier League home games this season and drawn three of their last five at Old Trafford, leaving them sixth in the table still.
"I think we had a difficult, bumpy start into the game," Rangnick said. "The first-half was difficult to find the rhythm, a lot of unforced errors, passes played in a sloppy way, the speed of our build-up was not high enough and that's why we had problems in first-half to find our rhythm.
"Overall, the second-half was better, but the goal we conceded in a moment where we had the chance to be on the counter-attack ourselves, being tackled away twice, losing the ball within six seconds when all the defensive players had closed up. Brilliant cross but we could have defended the cross on the wing and inside better, that goal didn't make life easy for us.
"The reaction to the goal was good, we came back from a goal from Fred and in the last 15 minutes we tried everything, not always taking the right decisions but we had two or three good opportunities.
"Jadon should have taken two touches on the far post when Fofana slipped and had Anthony Elanga stayed away from that ball when Marcus Rashford would have been completely free and either probably scored or it would have been a penalty.
"We tried, so I cannot fault the team for not trying and the effort in the last 20 minutes, but obviously, it was not a result we were trying to get."