Palace host 10th-place United sitting in fifth position on the Premier League table.
But on the favourites tag, Glasner insists: “Of course, I think it's huge progress. It just shows the progress in our journey and how well the players are doing, consistently doing, not being a one-hit wonder, really consistently now for months.
“And, yes, if you ask me like this, it just makes me proud what we all achieved together. But on the other side, I know football, and you can see it so often with other teams: it's never a good idea to look back.
“It's always best to look forward and look at what comes next. Because in football, momentum can change very quickly, and we always need to be on our highest level.
“But I have no concerns with this group of players that we are still going. Yes, today we will have a meeting because we train in the afternoon. The players should sleep. Sleeping is the best recovery. There will be a few very honest words from my side.
“But I know these players, so they will listen and they will try to adapt and they will try to improve. And that's a good thing.
“The next chance we have against Man Utd, every player will be highly motivated playing at home against Selhurst. We’re really looking forward it.”