It's been a busy summer transfer window so far with more than £200 million spent in the Premier League alone.
Preseason is the time to make sweeping changes and remodel your team if you have to, and managers are taking advantage of intense training sessions and warmup games to instill new beliefs and strategies.
We've looked at the Premier League dealings and picked out the most influential of the lot. By that, we mean the signings that can instigate real change in philosophy or shore up a particularly sub-par area of a team.
Players who've turned a season-long loan deal permanent, such as Andy Carroll, were not considered.