Former Chelsea striker Tony Cascarino said either Arsenal or Manchester City would win the Premier League title if they had Jose Mourinho as boss.
Mourinho returned to Stamford Bridge in the summer of 2013 and guided the Blues to their first title triumph in five years and Cascarino is convinced the Portuguese boss gives the west London club the extra quality.
“The difference between Chelsea and their rivals is the manager,” the former Republic of Ireland international told Sky Sports.
“I believe that if Mourinho was manager of Arsenal, he’d have won the league. Likewise with Man City. That’s the quality he brings.
“John Terry said Petr Cech is worth 15 points. Maybe so. Mourinho is worth more than that to Chelsea.
“We saw two Chelseas in the season. We saw a very entertaining one and then, when it got tight, they became tight and didn’t give too much away. That’s to do with the manager.
“How did they win the league? By being tactically brilliant. It’s no coincidence that in the last two years none of their major rivals have been able to beat them.
“That’s a massive disadvantage for them; he’s hurting every one of his rivals every time they play.”
Cascarino reckons City, Arsenal and United still have vital areas to strengthen before they can overthrow Mourinho’s side.
“Chelsea are the ones to beat,” he said. “Arsenal and City have got to be better tactically. United is interesting because of the big kitty they have to spend but they’ll still have to gel that group together if they bring in new players.
“All the things that other teams have to do – sort their tactics out, gel together – Chelsea have already done. All they’re doing now is what United and, before that, Liverpool used to do: add one or two to a group that was being successful to refine it.
“If you want to win the league next season, you’ve got to beat Chelsea.”
The former Porto and Inter Milan manager hasn’t lost a game against Man City, Arsenal and Manchester United – since his return to England.