Tennis Sponsorships

How does sponsorship in sport work?
When sports personalities have sponsorship – $40,000,00 for example how much goes to the player? In golf for example, how much do they get from the PGA? Tennis for example they get paid for appearance and for every round they play but I have never heard the equivalent in golf.
im suree not alot as the money would have to pay for coaches and other people you would imagine to be associated with them. i dunno if this helps but… http://www.coseley.dudley.gov.uk/pe/intra/sponsor.htm
