The oft-injured Canadian headed for home immediately after making the announcement.
Grigor Dimitrov's handiwork left Damir Dzumhur with no other alternative on Tuesday at Queen's Club.
World No. 1 on new cosmetics for his Wilson Pro Staff RF 97 Autograph racquet.
Low expectations and joie de vivre will carry Andy Murray forward on the first days of his long awaited comeback.
The British No.1 berated an umpire after a close call didn't go her way on Sunday.
Murray is back, and a signficant challenge faces the five-time Queen's Club champion.
The Argentine is following the advice of his doctor after a long clay season.
