When you are extracting a player (soccer or otherwise) from the field in order to display on a poster, what do you do with the feet? Often the players feet are partially covered by the grass and I was wondering what other people do to resolve that. Do you just extract the best you can? Do you try to clone the shoes?
I don't know if this would work with your poster layout but could you include some of the field, blur out the hard edges and let the field fade into the background...especially if the ball is in the photo? You could also try a motion blur on the feet that would hide the grass or missing parts of the shoe.
I will often not worry about the feet and just fade the lower parts of the player into the background but with soccer the feet are more important.
2) got any shoes similar to the player's? put 'em out on a table and take a photo of them, make sure to simulate the angle and lighting in your original photos as best you can. then copy/paste them into the original and blend well.
3) search thru the other photos you took that day and see if you can piece them together from other shots.
4) next time think ahead and take a few pics of player's feet from different angles while they are walking on macadam, dirt, gravel, etc.