Again, the ratio matters, not the total cost. Obviously a single player sport isn't comparable to a tech sport in terms of total financial costs... the racket

Again, the ratio matters, not the total cost. Obviously a single player sport isn't comparable to a tech sport in terms of total financial costs... the racket and shoes don't matter in terms of expenses, at all. RF's cost is in the millions and you are comming up with rackets... he is drawing a completely unfair advantage that only maybe 3 or 4 other tennis players can afford. thats like saying the F1 team only needs to purchase tyres.