Ex-Gunner thinks United have been papering over the cracks.
Former Arsenal midfielder Paul Merson doesn't believe the Red Devils will seal a win over Eddie Howe's side on Saturday, adding United are not good enough.
Bournemouth, who are looking to make it four wins in a row, host Manchester United at Dean Court and the former England international is convinced the homeside can compound Louis van Gaal's woes by preventing them from sealing three points after their Champions League exit at Wolfsburg during midweek.
"Bournemouth are coming off the back of two fantastic results, and Man Utd will be licking their wounds after a nightmare in Wolfsburg," Merson told Sky Sports.
"I'm going 1-1, I don't see Man Utd winning this. The easy thing is to keep clean sheets, but you've got to score at the other end.
"When Man Utd had to go and win a football match, like the other night, they concede three, and it could have been so much more. David de Gea made worldy after worldy in goal.
"I think they've been papering over the cracks, and the cracks really showed the other night. I don't think they're as good as people think they are."