Canada's Felix Auger-Aliassime put on a serving clinic as he beat Britain's Cameron Norrie in straight sets at the National Bank Open on Thursday.
Shorthanded Slovakia had little chance against the powerhouse Canadians, who were led by Mason McTavish's four-goal blitz on Thursday night.
Watson is set to be suspended for the first six games of the regular season.
Hundreds of Black NFL retirees denied payouts in the $1 billion concussion settlement now qualify for awards after their tests were rescored to eliminate racial bias.