The ten factors that drive transfer fees in football

What really drives how much a player is worth in the transfer market?

Why Diego Costa could be the most important signing this summer

Have Chelsea bagged the most important transfer of the summer?

Which part of the transfer market has your club been shopping in?

Is the Premier League really full of big spenders? Can clubs succeed without paying top prices?

Chelsea in 2014/15 – time for Mourinho to deliver

No more mind games – 2014/15 is the season Mourinho must deliver

The race for the title – where are the contenders most vulnerable?

As the race for the title intensifies, what are the big weaknesses of the teams vying for top spot?

Shooting stars: Which Premier League clubs spend most on their attack?

Half a billion pounds spent on new strikers since 2011 – but who has made the best buys?