West Ham boss David Moyes says they go to Manchester United in good shape.
West Ham defeated United earlier this season.
Moyes said, "We played very well against them at London Stadium and we're going to Old Trafford, which is such a hard place to get results.
"We'll try to put on a good performance. We're in a good run of form in the league in the main, and we'll try to keep going.
"Erik is in a privileged position, to be manager of Manchester United. I think he understands and respects it.
"I think he's tried to enforce the way he wants his team to play and work, and I can only give him credit for that. When you're in that job, you're expected to win and play well, and I respect that.
"They certainly got a great result away at Wolves last night."
He added, "Sometimes you have to make sure you don't lose. We've not been conceding too many goals but we've not had loads of goalscoring chances either.
"We can play better, we know that. I gauge my team by our performances and the performances are what we want to improve. But we're getting results and points without necessarily playing as well as we'd like."