Football has become an increasingly lucrative market over the past 25 years or so, and as a result, teams and managers have splashed eye-watering sums of money in pursuit of domestic and European dominance often to differing degrees of success.  Some managers have built their reputation off the back of financial backing, whilst others are famed for finding hidden gems in a market where inflated prices reign supreme. We’ve taken a look at the mangers who have spent the most money on transfers in their careers so far.