Top 20 transfers of summer 2011

Our selection of the best deals conducted during the current transfer window continues with three additions to our list this week, as clubs in Europe look to bolster their squads.

Each European transfer window, Goal.com decides on the best acquisitions, in order from 1 to 20, and we encourage you to let us know your thoughts.

We judge based on:

• The player's overall ability (this being the most important factor)
• How the player will fit into his new lineup
• How the player will adapt to his new surroundings, and vice-versa
• The transfer fee payable, if any, and any other financial details known. (Transfer fees unconfirmed by either club or otherwise unknown are given as approximations and are marked in italics.)

For the reason that players arriving on permanent deals tend to be more adaptable and often more important, there is preference given to full transfers over loans. That is not to say that loans, co-ownerships, etc., cannot be included, but players must be extra special to justify a space on such a move.

With all of that explained, here is the first installment of this summer's list - which will be updated every Monday. Expect to see lots of changes from now until the close of the window, with big moves still to happen on the continent.