Unai Emery has said that he expects his Arsenal team to be better after the return of three key defenders.
Rob Holding and Kieran Tierney started Tuesday night's Carabao Cup victory over Nottingham Forest after lengthy spells on the sidelines, while Hector Bellerin made a late cameo appearance also.
Arsenal's defence has looked a little bit shaky in recent weeks, and speaking to the press ahead of the clash with Man United, Emery says that he's thrilled to finally have the trio back.
He said: "It's amazing news.
"His behaviour, commitment, spirit, the atmosphere with them is going up. The Emirates on Tuesday with them was amazing, the reaction for Rob Holding, with Kieran Tierney, with Hector Bellerin playing the first 15 minutes after eight months.
"We can be a better competitive team with them. For us being available with every player is the perfect moment.
"Now we have two injuries, Lacazette and Emile Smith Rowe. Hopefully in a few weeks they can be training with us and available to play. Really we are really happy with Rob Holding, Hector and Kieran."
Arsenal fans will certainly be hoping that Rob Holding, Kieran Tierney and Hector Bellerin will be fit to start the game against Manchester United on Monday evening.