The former Chelsea manager reflected on how United eventually returned to the Champions League by winning last season's Europa League.
The 24-year-old is now being denied the opportunity to play his way back into form, with another spell on the sidelines being taken in at the worst possible time.
"I don't know yet [if he is fit to play] but he trained a little bit", he added.
"When a team gets into the last eight, the feeling is you are among the best, but anything can happen". Kick-off is at 19:45GMT, but we'll have build up for you before then before team news is out an hour before we get underway at Old Trafford.
Antonio Valencia has been effective in most games this season and should keep his place as a right-back while Luke Shaw could replace Ashley Young, who put in a superb shift at the weekend.
Carrick knows better than anyone in the squad about the high standards demanded at Old Trafford.
Manchester United are now in second place in the Premier League table.
"In football, you are going to be up, you're going to be down".More news: Irish Earn Top Seed In Postseason NIT
"So that's pretty much where I'm at, which is fine".
"It's kind of been sorted out (for a coaching role)".
However, I can see him having another frustrating evening, knowing he's not got the supply or support to show his potential, and will be left day dreaming of playing against Barca for Real Madrid next season. We're still talking about it, to be honest, so there's nothing to totally confirm as yet. The buzz in the stadium will be an obvious plus for United on Tuesday night but apart from that, the Liverpool match provided a glimpse of how Manchester United can adjust without Paul Pogba.
"He's always the first out on the training pitch", Mourinho told a news conference on Monday.
I do think at close to even money it is a great price on Arsenal to win given the quality of players who should play and it is another opportunity to build momentum, and get the fans that are there on side.
United boss Mourinho offered no insight into Pogba's injury, just that the club-record signing could be involved against Sevilla.
Daley Blind, Phil Jones and Marcos Rojo are also absent as he tries to guide United into the Champions League quarter-finals for the first time since 2014.