Sheffield United won away for the first time on their return to the Premier League at Everton.
A Yerry Mina own goal and a late Lys Mousset strike condemned Everton to defeat at Goodison Park.
Sheffield United manager Chris Wilder said afterwards: "We're delighted. It was just a ridiculous game. That's possibly the worst we've played all season. We didn't play anything like our best today but managed to win the game.
"Everton put a lot of balls in our box, which opened us up a bit in the first half. Out of possession we were really good. The goalkeeper and our three defenders did really well. I think they had a million corners today.
"We rode our luck a little bit - we certainly didn't have any last week. Everybody says that to stay in the Premier League, your home form has to be spot on. We've reversed that thought process."
