It's been a whirlwind couple of weeks in the European soccer universe, with teams attempting to cram a full offseason's worth of both transfers and transfer rumors into the shortest offseason ever. But as moves have become official, they have created a few particularly interesting position battles among the top teams on the continent. Here are a few of the most interesting, and most important battles on the docket, the outcomes of which could decide title races in Europe's biggest leagues.
(Note: the list below is not intended to be a comprehensive list of contenders, but a focus on teams with new-ish players and particularly interesting decisions to make.