Serena Williams and Carlos Alcaraz have reached the US Open mixed doubles quarterfinals after winning their opening match together, beating Erin Routliffe and Lloyd Glasspool 5-3, 4-1. The second edition of the new-look mixed doubles tournament at Flushing Meadows takes place this week Key points and original sources are listed below.

• Serena Williams and Carlos Alcaraz have reached the US Open mixed doubles quarterfinals after winning their opening match together, beating Erin Routliffe and Lloyd Glasspool 5-3, 4-1. For Serena, returning to the US Open court was a moment she never expected...S1

• The second edition of the new-look mixed doubles tournament at Flushing Meadows takes place this weekS2