Ralf Rangnick admitted Manchester United are not clinical enough after they were held to a demoralising draw by 19th-placed Watford at Old Trafford.
United had 22 attempts on goal but three were on target as they dropped more points in their effort to qualify for the Champions League next season.
Even though United have still lost once under Rangnick, they have drawn four of their last eight Premier League games and only scored at least two goals in four of Rangnick's 17 matches in charge.
Watford have lost 17 games in the league this season but will end the season unbeaten against United.
"Well, it feels once again like two points dropped we should have easily won," Rangnick said. "We did everything apart from scoring, we had enough chances in both halves to win that game, but we didn't and, not for the first time, we dropped two points in a very important game.
"We had enough chances. In the first-half, we had four clear opportunities that normally are enough to score at least one or two goals and second-half was similar.
"In the end it's about efficiency, being clinical in front of goal, and this is not for the first time, unfortunately. Apart from that, we were in full control of the game, we dominated the game. In the last five minutes they had one or two transitional moments and apart from that, we dominated the game completely.
"Our job as coaches and head coaches is to help the team create enough chances. If we only had two or three opportunities in the game, we could ask ourselves what can we do to create more.
"But the number of clear chances we had today have to be enough to win a game like this."
