Felix Auger-Aliassime

Canada’s Felix Auger-Aliassime is out of a Grand Slam in the first round for the second time in a row.

The Montrealer’s inconsistent season continued with a 6-2, 6-4, 6-2 loss to 18-year-old Jakub Mensik of Czechia on Tuesday at the US Open.

The 19th-seeded Auger-Aliassime also lost in the opening round at Wimbledon before rebounding to reach the bronze-medal match in men’s singles at the Olympics in Paris.

But Auger-Aliassime entered the season’s final Grand Slam on a down...