"Sometimes it's easier to play against the big teams and the best players," Johnson says.
"It brings more out of you and maybe, rightly or wrongly, you prepare that little bit harder. Everyone looks forward to the big games and that's what can happen."
If he learnt one thing about becoming a champion under Mourinho, it was that putting defeats away is the mark of title winners. "It's about dealing with mistakes and getting over bad results very quickly. A sign of a good team is one that bounces back quickly after a disappointing result and that's what we will be looking to do on Sunday."
Liverpool's season has certainly revealed a capacity to do that. The 3-1 defeat at Hull on December 1 was the club's most desperate performance of the season - and one in which Johnson's inconsistency revealed itself - but it was the catalyst for four straight wins in which the side scored 17 goals. The display at Manchester City on Thursday, even though they lost 2-1, was up to the same mark. A dismal loss to Arsenal last month was followed by the 4-0 hammering of Fulham.
The challenge for Liverpool is to maintain the same level of football in the second half of the season with a squad palpably weaker than that of Chelsea, Arsenal, Tottenham or either of the Manchester teams.
"In terms of the starting XI, I think we can compete. It's just a question of getting it right on the day and everyone performing to the best we can," Johnson says - though there is an acknowledgement that every elite manager's wish to have two players for every position is something Rodgers has not been granted.
The lack of depth is particularly evident in a defence where Johnson is the only fixed point. He does not observe that central defence is a worrying problem, with the ever-changing personnel a product of Rodgers' struggle to find consistent performers. But this is a far cry from the indomitability of Sami Hyypia and Jamie Carragher when Liverpool last seriously chased a title, under Rafael Benitez in 2008-09.
Right back Jon Flanagan has been playing on the left of defence because of injury to Jose Enrique and the unsuitability of Aly Cissokho. Liverpool are less powerful in central midfield than the other top-four challengers. Joe Allen's performance against City was one of his best for Liverpool but he, Lucas Leiva and Jordan Henderson are not Javier Mascherano and Xavi Alonso, from the class of 2008-09.
Yet the performances against City and Spurs - destroyed 5-0 - have revealed that Liverpool can compete with strong sides.
"We definitely can match City," says Johnson. "[Our performance there] is probably the most positive you can be with a defeat. Not many teams [go to the Etihad] and play the way we did and dominate possession. We had some good chances and are disappointed we haven't got more than we have."
Johnson observes that the geometrical precision of Luis Suarez's link-up play with Philippe Coutinho and Sterling - rejuvenated since his contribution at White Hart Lane - proves this is not the same one-man team of last season.
"You can't be top of the league at Christmas if you are a one-man team. We know we have got the quality to be up there and on our day we can give anyone a game."
Formula One and MotoGP absorb him, too and his desire for a life beyond the football bubble means he is happy not to talk about the game when he is away from his club.
But the desire to barge in on Mourinho's territory and teach him something about patience and success does burn.
The tattoo on Johnson's wrist, which he rubs as he talks, tells the story. "Tell me I can't and I will show you I can," it reads.
- Independent
