A wild summer window saw the market explode so that nine-figure sums are the new normal, writes Lawrence Ostlere. So are £100m fees ever justified or entirely detached from reality?

Premier League clubs took transfer spending to new heights this summer, splashing the cash in an arms race, but which will flourish and which will be left with buyers' regret?

Certain position groups have boomed, but huge fees have been spent bolstering all corners of the pitch this summer.