Jose Mourinho admitted Manchester United are not scoring enough goals after Zlatan Ibrahimovic salvaged a point with a 94th-minute penalty.
United's top-four hopes suffered another blow after a ninth Premier League draw at home took their tally of dropped points at home to 21 this season.
Mourinho's side have managed just 21 goals at home in the league, fewer than Burnley, Bournemouth, West Brom, Watford and Leicester, with Mourinho acknowledging the need to improve.
“I could feel some of the boys in trouble by the confidence levels,” said Mourinho. “So we had to start playing more direct.
“We've had lots of unlucky decisions by referees. We've had lost of amazing performances from opposing goalkeepers.
“We've had lots of ultra-defensive teams coming here, but we need to score goals. We have chances and we need to score goals.”
Ashley Williams was sent off for handling Luke Shaw's goalbound effort in added time, Ibrahimovic's subsequent penalty cancelling out Phil Jagielka's opener and stretching United's unbeaten league run to 20 games.
“I would sign immediately for 20 matches unbeaten next season because in the modern Premier League it's very difficult to do it,” said Mourinho.
“But we need to score goals to win matches. We don’t score enough goals. We're the second team in the Premier League with most shots, but we are the third worst in relation to shots and the number of goals we score.
“How many goals have Marcus Rashford, Jesse Lingard, Henrikh Mkhitaryan and Paul Pogba scored? How many goals from the attacking players? Not enough.”
Mourinho savaged Luke Shaw again, despite the left-back coming off the bench and earning the penalty with his late effort on goal.
“He had a good performance but it was his body with my brain,” said Mourinho. “He was in front of me and I was making every decision for him.
“The communication was possible because we were very close. I was making every decision for him.
“At this level we need the fantastic body he has to play football, the fantastic physical qualities and technical qualities, but he cannot play with my brain. He must accelerate the process.
“At 21 he is old enough to have a better understanding, but his contribution was good to improve the team.”