Macau’s government opened bids today from seven companies, including a wildcard from Malaysian operator Genting, for licenses to operate casinos in the world’s biggest gambling hub, kicking off a closely watched battle for six available slots. Macau’s top officials including the city’s Economy and Finance secretary Lei Wai Nong and Secretary for Administration and Justice André Cheong attended the opening together with top executives from Macau casinos Las Vegas Sands Macau unit Sands China, Wynn Macau and MGM China. All six incumbent Macau players, which also include Galaxy Entertainment, Mel…