Manchester United boss Solskjaer failed to steer his side past Wolves on Saturday, with Raul Jimenez and Diogo Jota on target for the home side.
It was a second consecutive defeat for the Red Devils, who had previously been beaten 2-0 by Arsenal in a Premier League showdown at the Emirates Stadium.
Manchester United have performed with zest and purpose under Ole Gunnar Solskjaer – in a stark difference to life under Mourinho.
The 56-year-old won two trophies during his time at Old Trafford in the form of the EFL Cup and Europa League crowns.
But the football was often lacklustre – and a far cry to the swashbuckling days of the Sir Alex Ferguson era.
And The Sun say Solskjaer laid into their sloppy display, accusing them of going back to the Mourinho days.
The Norwegian also reportedly told his team to use the international break to analyse their own performances.
And whether United can bounce back against Watford on March 30 is something only time will tell.
Solskjaer was, understandably, tetchy after the defeat to Wolves.