I shoot the high end football, and it all depends on the game, the ground etc.
Usually around anything from 3 photographers up to 15/20 odd, match dependant.
these days we all spread out, around the entire pitch, but i try to sit where the attacking side celebrates when they score, so you get a good celebration shot.
Some photographers cluster together but for me its crazy to do this, as a rule of thumb i stay away from Getty and AP as they have contracts with the nationals so no point getting the same angle as them,
1 remote cam with wide angle behind goal with remote
one body with 70-200 2.8 with the remote trigger to fire off the wide angle.
and my other body with a 400 2.8 on for the mid field shots and tight portraits etc
we usually sit low down behind the electronic signs so we can be stealth, look out big res jackets.
hotp that kind of answers any questions