Hot idea with much sensuous detail. It's a good attempt, would be more effective if the text were split up a bit and maybe explained how the subject landed in this situation. Has he actually sworn some sort of oath to Ms Sharapova? Is it a wager?

It would serve the story, too, if you indicated by some detail early on whether the narrator is a man or a woman; we don't find that out for sure until the cock is mentioned. I figured it was likely a guy, but of course lesbians get off on female tennis stars too. Good luck, and I hope to read more from you!
Thank you very much for the kind response.

The subject is a male fan. He was heckling Maria throughout the match and when he decided to take a toilet break, Maria had her minders kidnap him and take him to her hotel room when they left him tied until Maria could get back and give him a good punishing.

The narrator is a male yeah.

I have another story that I am in the middle of writing, its going to be very long when its finished, this is just a short story in comparison. I'll post it here now if you would like to read it, again it features female tennis stars.