"It was a really frustrating day and performance," said Ancelotti.
"There are some excuses but I don't want to have excuses, the performance was not acceptable. The spirit of the team was unacceptable.
Sheffield United boss Chris Wilder to BBC Sport: "I really enjoyed watching my team. Right the way through, it was a great effort.
"We were stretched in terms of numbers, but it was a committed performance and one that, ability wise, had the hallmarks of a proper Sheffield United display.
Wolves manager Nuno Espirito Santo speaking to BBC Sport:
"I'm happy with the hard work of the players, but we did not start well. We were not able to have our possession. We won a lot of second balls which was important in this game.
Spurs manager Jose Mourinho speaking to Match of the Day: "I think unfair. The players didn't deserve the defeat. We were punished by, I would say, mentality mistakes. You have to be ruthless against teams like Wolves that plays fantastically well on the counter-attack.
Wolves manager Nuno Espirito Santo on Jota: "He is always confident.
"We know a player's performance can go up and down. It's the right decisions, the right solutions we try to find to keep sustaining his performance - not only him, but all the team.
Wolves manager Nuno Espirto Santo: "It is not about frustration but realising what we did in the game and now analyse to say 'we could (have won)'.
"Leicester had possession in the first half but did not create, we scored in the first half and dominated a very good team.
Liverpool manager Jurgen Klopp to BBC Sport: "We changed the system two or three times, we calmed it down. We had incredible chances in the first half and then at the end it was a magic moment from Bobby.
Southampton manager Ralph Hasenhuttl:
"As everybody sees, we had a good first half and a not-so-good second half.
"The opponent showed how you can turn the table with a few lucky moments, and I think we had a chance to score the third goal, when we were a little bit unlucky with the Long header on to the post.