The Manchester United board will target Borussia Dortmund boss Jurgen Klopp to replace David Moyes if the club's poor results continue.
According to the Daily Mirror, the United hierarchy is unsure if it can trust Moyes to deliver with a £200m transfer budget this summer. He failed to secure many of his top targets last year, eventually signing Marouane Fellaini for £27m on summer deadline day.
United are exploring their options ahead of what is set to be a defining summer, and they reportedly held preliminary discussions with Dutch boss Louis van Gaal to sound out his interest earlier this month.
But the report claims Klopp would be United's ideal candidate to replace Moyes should the German boss signal his willingness to swap clubs.
The two-time Bundesliga winner recently committed his future to Dortmund by signing a contract until 2018.
But United officials believe his exciting style of attacking football is exactly the brand they want to instil at Old Trafford, and it just so happens to be the polar opposite of the cautious approach seen under Moyes so far.
And Klopp could be open to a move having watched on helplessly as two of his best players, Mario Gotze and Robert Lewandowski, have been allowed to leave for rivals Bayern Munich.
United are ready to throw £200m at the problem this summer, having watched Moyes turn a title-winning team into one that is struggling to keep up with the top four.
But United will face competition for Klopp, with Barcelona also eyeing him up as a replacement for Tata Martino.