When Sir Alex Ferguson retired from football management last season, the door opened for a new coach to be considered the best in the Premier League.
Brendan Rodgers, Alan Pardew and Mauricio Pochettino, too, have all achieved considerable success so far this term - with less resources available to them than those in the top three.
But the man who has impressed the most this campaign is one who has only just started his new job after four years with Wigan Athletic. He has guided his new club to fourth place going into 2013, despite the lack of a huge transfer budget, and has got his side playing some of the best football in the league.
Could Everton boss Roberto Martinez be the best pound for pound manager in the Premier League?
The Spaniard's impact at Goodison Park has been instant, with the Toffees only losing once at home and taking points from Chelsea, Liverpool, Arsenal and Manchester United.
And Martinez has done so without spending large sums of money, instead opting for a select number of specialist loan signings, while mainly working with the same team he had inherited in the summer.
Indeed, Martinez's impact has even made many think twice about just how successful David Moyes was during his Everton tenure.
Taking a simple formula of looking at performance against money spent, the 40-year-old comes out shining. But his record becomes even more impressive when you consider his past achievements.
Martinez's CV does not read as well as the likes of Mourinho and Wenger, who have achieved renowned international success, but his exploits with Wigan show a manager really achieving outside of his station.
In that respect, Manchester City boss Pellegrini perhaps gives him a run for his money, with the Chilean having guided Villareal to the Champions League semi-finals, as well as last season's run to the quarter-final with Malaga. It is difficult to imagine any of the Premier League's highest-paid managers achieving such success at a club like Wigan, however.
Despite their eventual relegation, Martinez worked wonders at the Latics and ended his reign with a historic FA Cup win.
And the Spaniard has continued his fine managerial form on Merseyside, as real hope of Everton reaching the Champions League exists once again.
The way Martinez has got the likes of Seamus Coleman and Ross Barkley playing truly inspires, while the success of loan signings Gareth Barry, Romelu Lukaku and Gerard Deulofeu is testament to the 40-year-old's transfer nous.
With the Toffees sitting in fourth, Martinez has plenty to shout about already. But you sense it is only the beginning for a man with a huge future lying in wait.
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