Two Premier League clubs have signed new managers this week, one, Slaven Bilic, used to play for his new team (West Ham), and one, Steve McClaren, didn't (Newcastle).

There's always been a certain romance attached to teams bringing in a manager who enjoyed previous success or cult status at the club as a player.

Look at the appointments of Shearer and Keegan at Newcastle for example, or even Dalglish and Souness at Liverpool.

Heck, Ryan Giggs is often tipped as taking over Manchester United, one of the biggest clubs in the world, despite him seeming having no managerial credentials whatsoever.

Such appointments are often greeted with the reassurances that the former player "understands the club" usually "inside out", as if the only thing that might have changed at the club in the 20 years since they last played for them is the odd lick of paint.

So do managers that once played at their new club fare any better than those who have never set foot in the home dressing room?

To find out, we have taken the records of each of the 2015-16 Premier League teams' full time managers since the end of the Second World War and have compared the ones of those who used to play for their respective teams to those who never featured for them.

During that time, managers who had never played for their clubs won an average of 38 per cent of their games.

Managers who had played for their respective clubs also won an average of 38% of their games.

On the face of it then, having previously played for your respective team makes no difference to the percentage of games you'll win as the manager.

There are, however, some exceptions.

Aston Villa have traditionally performed better under managers who had previously played for the club.

With former players they have won 41% of their games since the end of the Second World War, but only 36% of games with a managers who weren't former players.

Everton have won 40% of games under managers who used to play for the club, and just 36% of games under those who never played for the club.

For Liverpool the win ratios are 53% and 48% in favour of former players and for West Ham it's 40% to 35%.

For some clubs though, it's the other way around.

Stoke, for instance, have won and average of just 25% of games with a former player in charge compared to 37% without a former player.

For Manchester United it's 37% with a former player and 46% without a former player.

Of course, those figures for a non-ex-player include Sir Alex Ferguson and Sir Matt Busby, two of the most successful managers in the history of the football league.

Chelsea too have flourished under managers who never played for the club.

Rafa Benitez and Jose Mourinho have both won silverware for the west Londoners, though so too did former players Gianluca Vialli and Ruud Gullit.

Overall though, managers who never played for them have won an average of 48% of games for Chelsea as opposed to the 43% by former players.

Win percentage of managers to have played and not played for the club previously

Percentage wins by managers who have:

Club | Not played for club | Have played for club

Arsenal | 46 | 45

Aston Villa | 36 | 41

Bournemouth | 37 | 37

Chelsea | 48 | 43

Crystal Palace | 33 | 37

Everton | 36 | 40

Leicester | 35 | 30

Liverpool | 48 | 53

Man City | 39 | 42

Man United | 46 | 37

Newcastle | 33 | 41

Norwich | 39 | 36

Southampton | 34 | 34

Stoke | 37 | 25

Sunderland | 34 | 34

Swansea | 31 | 32

Tottenham | 44 | 43

Watford | 35 | 32

West Brom | 36 | 33

West Ham | 35 | 40