The other downside for United is that this was also a night when they lost another of their centre halves to injury. "The same way I know the players much better now and the players should know me also much better now", Mourinho told reporters on Wednesday.
United advanced 3-2 on aggregate to join Lyon, Ajax and Celta Vigo in the last four, after a tension-filled night of quarterfinal second legs in Europe's second-tier continental club competition.
But the 3-2 aggregate success came at a price, with Ibrahimovic and Rojo both seemingly set for extended spells on the sideline after being taken off.
Jose Mourinho's side should have put the game to bed well before the full-time whistle, just as they should have done in the first leg of their quarter-final tie, which finished 1-1 in Belgium.
The Manchester United manager said the severity of the injuries is likely to be known in "a couple of days".
"If you think [about] the poor teams they have played at this stage, the amount of games they have got shouldn't be a problem". That's the way I think.
Though they would most likely have gone out with the concession of a second away goal, United tore into Anderlecht again in extra-time, crafting a further succession of chances before, in the second minute of its second period, Rashford took possession in the box, took a delicious first touch, paused, found a Cruyff turn out of nowhere, and slid home the victor which capped another fantastic individual performance. I don't expect miracles. But you have to try to do everything to accelerate the process. They are injured and they can not make Sunday. There are no miracles. Rashford's first attempt to find Henrikh Mkhitaryan came back off the nearest defender but he picked him out the second time.
Mourinho had kinder words for left-back Luke Shaw, having publicly and sharply criticised the England worldwide on several occasions in recent weeks.
'We have [Eric] Bailly and Blind who have experience and it's time for Jones and Smalling to be courageous - to [take a] risk - because for the team you have to do everything.
"I know we are together for nearly 10 months now".
"'If you need to make a change in another position, do it, because I'm ready for it'".
"That's why Marcus Rashford, even without being since September with a goal in the Premier League, even without that, he was always a player that I trust, always a player that I play, always a player that I support". But while it won't show up in the basic stats, it was Pogba's pass that directly created the goal, and it was the exact kind of non-statistical play that makes up the bulk of a true central midfielder's game. I kept the confidence in him.
Roared on by their raucous away support, Anderlecht gave United several scares before finally succumbing in the 107th minute. "Ibra, he's class. Now that he's approaching the end of his career, people start understanding he plays a role, but he plays a good role, and he's a great pro".
Reflecting on the first leg, Anderlecht Head coach Rene Weiler said: 'It was hard for us in the first half.
Anderlecht finished the first half as the more threatening side whereas early on Mourinho must have liked what he saw.