Mourinho had hinted before the game that many of his stars are now under-performing and, tellingly, Paul Pogba and Alexis Sanchez were both left out of his starting line-up.
When asked about his experience of working with Mourinho, Matic termed the Manchester United boss as a victor and hailed his pedigree for winning trophies.
Asked about the apparent falling out between the manager and player, Barton told the Alan Brazil Sports Breakfast: "Mourinho kept looking at Luke Shaw like he's something he's just stood on while out walking his dog".
Often a feature of any new manager's tenure at a club, there will be certain players who fall foul of his ideals for the future. It would be Shaw's diet, commitment or displays on the pitch.
Indeed, it's no sure thing that Salah and De Bruyne would have reached the levels they're now at if they'd have remained at Chelsea under Mourinho. It's a tactical quirk of which we know Mourinho is proud, because he's always telling us about it, in both bad moments and good.
Mourinho's latest criticism of the left-back comes just months after he claimed the defender was "one of the best players in that position".
We prepared the team to be more aggressive, to attack the last line much more, and that connection between defenders in possession and attacking players didn't work. Of the 110 matches that Mourinho has presided over, Shaw has been available for all but 25.
And this quote is quite telling.More news: Trump confesó que le mintió a Trudeau y alardeó sobre el hecho
Shaw has struggled to get a consistent run of games in the team since and now he has reportedly fallen out of favour with Mourinho.
As it happened, Shaw spent the rest of the 2016 out with a groin injury. Nemanja Matic aside, his players had displayed a "lack of personality, lack of class and lack of desire". Mourinho lambasted at his players even after a comfortable stride against Brighton and advised them to wake up.
If Mourinho could come up with a game plan that played to the strengths of Pogba or Sanchez rather than marginalising them, might they suddenly start showing evidence of personality, class and desire?
"In Sevilla, there are many players who would play in my team". That is unless anyone wants to sign next season's PFA Player of the Year Anthony Martial?
For all of the noise and nonsense which surrounds Mourinho - and much of it is of his own making - the Glazers and Woodward only need to look at the Premier League table to realise that life for the club is as good as it has been since Sir Alex Ferguson stepped down in May 2013.
Mourinho's public castigation of Shaw on Saturday night was by no means an isolated outburst.
Leicester could offer him a higher standard of play because they will likely be pursuing a top-half finish rather than facing a battle for survival next year, while reuniting with former Saints mentor Mauricio Pochettino at Spurs could reignite his career and see him remain at a UEFA Champions League side.