With a flurry of managerial and personnel changes at the top six clubs in the Premier League, how will the new managers fare with their new teams - and how will the 'old' managers battle new challenges in the form of 'imported' players and managers?
And, most importantly, which manager have a point to prove?
David Moyes | Manchester United
The new United manager has plenty of experience in the Premier League after spending 11 years with Everton in the top flight. But he is definitely a novice when it comes to management of a club with a stature as big as Manchester United.
Moyes will have to prove he capable of handling the egos he will find in the United dressing room. He will have to prove he can effectively and efficiently use a bigger transfer budget than he has ever worked with. But he has already shown he has an eye for talent, as proved by playing the likes of Wayne Rooney, Marouane Fellaini and Leighton Baines.
Most importantly, he will have to prove that he can deliver success to an already successful outfit considering that he never won any silverware with Everton. And with the considerable success achieved under Sir Alex Ferguson and with his shadow looming large, Moyes is under considerable pressure to succeed at all costs.
Manuel Pellegrini | Manchester City
The Abu-Dhabi owners of Manchester City have invested good money in the squad and facilities over the last few years. Now they crave dividends from their investment in the form of league and European success.
This success Roberto Mancini could not bring and thus Pellegrini has been entrusted the responsibility of utilising quality players for domination.
He will have to replicate Malaga's performance in the Champions League last season as City look to improve on their group stage exit from the competition in the last two seasons under Mancini.
And with a great squad plus equally good signings, all he has to do prove he is a better man manager than his predecessor. He has little excuse not to succeed.
Brendan Rodgers | Liverpool
Rodgers enjoyed a relatively successful season with a new squad undergoing transformation last season. Now with four signings made already, and others to follow, Rodgers will have to prove he is capable of guiding the Reds back to the top four of the Premier League.
He may not be expected to win the league just yet, but a top-four finish will surely be a priority. And he must prove that he can hold his own against managers with a wealth of experience, including those mentioned in this article.
After a stunning season with Swansea two seasons ago, the Northern Irishman has a lot to do to maintain and sustain his reputation, while at the same time building a team capable of challenging for European honours.
Arsene Wenger | Arsenal
Eight years after their last trophy success, Arsenal look ready to stake a claim for the Premier League and other trophies once again. Wenger is no stranger to the league - he has been with Arsenal for over 15 seasons.
As a result, he has little to prove. But if Arsenal do sign all the players being linked to the club - most notably Gonzalo Higuain and Marouane Fellaini - then Wenger will have a lot to do to convince the Arsenal board and the tired fans that the trust reposed in him in these eight years is not misplaced.
Most importantly, he will have to prove he still has what it takes to compete with the very best at the very top, especially after last season's near-miraculous qualification for Champions League football. And with new, fierce-looking competition, Wenger has a hectic task on his hands.
Andre Villas-Boas | Tottenham
The youngest of the managers in this article, Villas-Boas has lots of potential. His ill-fated spell with Chelsea is way behind him. Now we can see the manager Chelsea signed from Porto.
Last campaign, he guided Spurs to a club record points total in the league and only missed out narrowly on Champions League football on the last day of the season.
Under him, Spurs played excellently in the Europa League too and will surely be contender for the trophy next season. Star man Gareth Bale was a real star last season - because AVB utilised his talent and brought the best out of the Real Madrid target. Now with Paulinho and David Villa likely to join Spurs, AVB has only one thing to prove - that he is not a Premier League underachiever.
He must beat off competition from up to six likely opponents including his former mentor and secure a place for Spurs in the Champions League next season. And to do this, he must bring the best out of his players, just like he did last season. But he must do that now more than ever.
Jose Mourinho | Chelsea
The Special One is in England for a second spell with Chelsea. He is definitely the most successful manager the club has ever had, and he is liked by fans and players alike.
Now the Special/Only/Happy One (choose as necessary) has a lot more to prove than all other managers discussed here. First of all, he has to better, or at least equal, his record from his first time with the Blues when he won the league in his first season.
And because of the high standards Mourinho sets for himself, he must prove this time around that he is still the Special One and that he still retains that special touch with success.
Finally, he has to prove that his ego can be kept under control for the good of the team - something he couldn't do in Madrid.
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