Amid the seasonal transfer babble, it is easy to neglect the value of compatibility between tactics and personnel. Expensive stars can flop in unsuitable systems, and even the brightest strategist will hit the wall if his squad has the wrong profile. This is rarely an issue at clubs with long-serving managers, but those instances are becoming rare, with the Premier League now dominated by recent arrivals rushing to mould teams in their own image. Who has the most work to do? Below is a ranking of the best and worst matches between squad and manager as of now.