The dream team of Serena Williams and Carlos Alcaraz have signed up to the US Open mixed doubles championship, but the American great won't be playing in the women's singles.
Source: [Sky Sports](https://www.skysports.com/tennis/news/12040/13575872/serena-williams-tennis-icon-to-team-up-with-carlos-alcaraz-for-us-open-mixed-doubles-tournament)