What's your favourite sport?

Karen: What's your favourite sport, Louise?
Louise: Oh, I like ice-skating very much.
Karen: Do you usually skate?
Louise: No, I'm not very good at skating. What about you?
Karen: Well, I'm keen on tennis.
Louise: Really? I didn't know! Do you play well?
Karen: Yes, I'm good at tennis. In fact, I'm playing a championship in my club.
Louise: That sounds interesting. How many players do you have to beat to win the championship?
Karen: Twelve.
Louise: Wow! That's a lot.
Karen: Yes, but I've already beaten four of them. I hope I won't lose the next game.