LAS VEGAS — The fight hasn’t been made yet, and may not ever happen. But this city’s casinos are already taking bets on who will win if Manny Pacquiao and Floyd Mayweather Jr. ever get into the ring.

Pacquiao, coming off his dominating win over Miguel Cotto, opened as an 8-5 favorite at sports books operated by Station Casinos, and it didn’t take long for bettors to take a side.
Several $20,000 bets were put down on Mayweather, forcing the line down to 7-5 in the early going, said Art Manteris, the casino operator’s vice president of sports book operations.