Okay, he's not sure of how, but his last client got him tickets so he could go watch every single one of the competitions in the Olympics in any sport he wanted. They even payed the plane ticket. Sherlock thought it was a bit much but eventually Lestrade talked him into accepting the gift.

So there he is, Paris, the thing is crowded, he's got his tickets and his money and honestly he's kind of excited to go see a certain person who's competing this year