A win at mid week won't be putting anything right. If the club don't sack him immediately, they have no one but themselves to blame.
Sack the manager now. Give the keys to Ruud, bring Ole in as an assistant until the end of the year, as we organize a longer term solution over the next few months.
As a manager is has been on the knife edge for most of his tenure...I'm not saying a victory against Porto puts everything right, but I am saying a win gives him another week.
But at this point it all just feels like delaying the inevitable.