The 27-year-old was left hanging when she got a text from her would-be doubles partner.
The mixed doubles draw was released on Wednesday in London.
The Scot will make his Laver Cup debut in September in London.
The end of an era: Feliciano Lopez says good-bye to Wimbledon.
Maxime Cressy earned high praise from Felix Auger-Aliassime after knocking the Canadian out of Wimbledon.
The stars and stripes are starting strong at SW19.
The Pole has trumped the sisters in one category, but knows she isn't in the same league as the legendary sisters - yet.