Bruno Fernandes felt Manchester United threw away the game in defeat at Chelsea.
Fernandes scored but United lost 4-3 after Cole Palmer scored twice, once from the spot, deep into injury-time.
The captain later said: "We had the game in our hands and we gave it away.
"It's frustrating. It's difficult to take. We had good control in the last few minutes. But they got two chances and scored two goals.
"From the corner we have to be much quicker. We knew beforehand they take corners and throw-ins quickly.
"In the last games we've conceded too many shots. It's about defending your box.
"It's a big game [on Sunday against Liverpool]. I don't need to say anything [to his team-mates]. If I need to say anything it's a problem because this is a massive club."
