Ian Wright has expressed his belief that Thursday's Manchester derby should be deciding the destination of the Premier League title, not who finishes in the top four.
Both Manchester City and Manchester United spent big in the summer, but have been unable to challenge Antonio Conte's Chelsea at the top.
Arsenal legend Wright has pointed to the failure to compete for the title from both sides as evidence of their underachievement this season.
"It is a reflection of how badly both have performed," he wrote in The Sun. "
With United recovering from a sticky start to string together a 23-match unbeaten run in the Prem, it is Guardiola who is inevitably copping most of the flak.
"I get the feeling there have been plenty of people who were hoping he would fall flat on his face in the Premier League and they are already starting to snigger away.
"But even though City have been guilty of being far too inconsistent, I wouldn’t be in a mad rush to judge whether he has been a success or a failure just yet."
Wright added that the ageing squad Guardiola took over on his arrival has hindered him, and that next season will be the time to judge the Catalan coach.
Guardiola's opposite number on Thursday Mourinho, meanwhile, has impressed Wright in recent weeks.
"Mourinho has shown he knows how to put a stranglehold on top opposition — like the recent 2-0 win over Chelsea," he said. "
It seems everything Jose tries is coming up roses at the moment.
"Having closed to within a point of City, United will know this is a game they cannot afford to lose.
If the gap goes back to four points, with so few games left, it could mean the end of their top-four bid.
"But sorry Pep, I think things are only going to get worse before they get better."