Manchester United boss Erik ten Hag says no-one is getting carried away after victory over Liverpool.
United face Southampton in the early kickoff on Saturday.
Ten Hag said: "The spirit was already good but now it is even better [following Monday's win].
"But it's only one game so we have to build further, we have to develop and I think everyone is aware of that."
He continued: "Casemiro is fit. He did all the training sessions. He trained first individually and the last days he trained with the team.
"(Anthony) Martial came out with a problem on his Achilles, out of the game, so we have to wait.
"I cannot tell a prognosis, how long it takes. I hope he will be available for the next game."