Tennis: Rolex (watchmaker) becomes an official sponsor and official timekeeper of the US Open

The Swiss watchmaker Rolex, has become, an official sponsor and official timekeeper of the grand slam tournament of the US Open as part of a "multi-year" partnership with the USTA (US Tennis Association), on 23/07/2018. Rolex replaces the Japanese watchmaker Citizen and also becomes a sponsor of the Cincinnati Masters (Ohio, USA), the "Western...