Manchester United's season officially turned into an unsuccessful one on Saturday as an Eden Hazard penalty condemned them to defeat in the FA Cup final.
It would be an overstatement to say that there is a panic at United after the loss but there is certainly a strong feeling of frustration, given the investment.
Goalkeeper remains the only part of the team that feels settled, with every other area seeking improvement at some level.
The squad needs freshening up if United are going to keep rivals Manchester City even remotely in sight.
Anthony Martial and Marouane Fellaini are expected to leave, freeing up space for new faces in midfield and attack, while United's defence may feel the brunt of the work this summer.
Summer signing Victor Lindelof hasn't enjoyed the debut season that the club had hoped for, falling down the pecking order to 4th choice - Mourinho may feel they need to try again at centre back.
As for fullback, Ashley Young and Antonio Valencia are both 32-years-old now, making both positions high priority this summer.
And the club has wasted no time getting negotiations moving along for Valencia's potential replacement: Atletico Madrid's Sime Vrsaljko.
The Mirror reports that the Croation is being priced at £35million by the Europa League winners - a comfortable profit on the £15m they paid Sassuolo for him in 2016.
With talks already underway, it's clear that United want to get as much business as possible done before the World Cup.
A report in The Times last week suggested that United were focused on a move for Juventus' Alex Sandro to fill the role on the other side in a similarly eager approach.
Defeat in the cup final has soured their season but United clearly want to waste no time in correcting things.
It'll take further investment, likely a lot of it, and the team Mourinho puts out next season might look quite different from the one that stuttered this year.
With nearly every position on the pitch up for re-evaluation, the United boss will have some freedom to chop and change until he gets what he wants - but he's surely running out of time to find it.