Wolves boss Gary O'Neil accepts they face a major test at Manchester United on Monday.
O'Neil leads Wolves for their opening Premier League game at Old Trafford.
He said, "They're a good side, a very good side, and I watched a fair bit of them in pre-season, but I've still got more to do. They've had some good performances and some fantastic players, and I think they will be better than they were last season from what I've seen, so it's going to be a big challenge.
The big challenge for me will be that every other club in the league have been working towards this game for six weeks in a certain way and we've had a very different pre-season to that and have been working in a different way until four or five days to go.
But there are no excuses in there and I'm aware we have a Premier League game on Monday, so I want to make sure the group is as ready as we can be.
It will be a big test. It always is. When Wolves went there last season it was a big test, when I went there with Bournemouth last season it was a big test, when Man City go there it's a big test, it's a tough place to go, but I'm looking forwards to it.
It's a fantastic place to go and a massive place to take a team, and I'm proud to lead such a big club and go and compete at a top stadium against a top side. Of course, we want to come away with something, so a lot of work still to be done over the next 48 hours to make sure we're ready."