World champions Argentina opened their bid for back-to-back Copa America titles with a 2-0 win over Canada in front of a crowd of 70,564 at Mercedes-Benz Stadium on Thursday.
Julian Alvarez put Argentina ahead in the 49th minute but a combination of inspired goalkeeping from Canada's Max Crepeau and Lionel Messi's surprising lack of precision in front of goal ensured that the underdogs were in the game until Lautaro Martinez settled the contest in the 88th minute.
Backed by a huge support decked out in light blue and white striped shirts, Argentina fully deserved their victory but Canada, ranked 48th in the world, can take plenty of credit for the way they fought with the 15-time Copa America winners.
Alvarez, preferred to Lautaro as Messi's strike partners in attack, had the first opportunity when he charged down an attempted clearance from Ismael Kone and broke away.
But the Manchester City striker took a heavy touch as he bore down on Canada keeper Max Crepeau, who was able to smother the ball.
Messi, who became the most capped player in Copa America history, making his 35th appearance in what is his seventh tournament, then went close to an opener himself but his angled shot from the left flashed just wide of the far post.
While the Argentines were exploiting gaps in the Canadian defence, Jesse Marsch's team were nonetheless competing in midfield and creating some half-chances for themselves.
Alphonso Davies and Liam Millar both had shots blocked inside the box and Tajon Buchanan screwed an effort from a tight angle wide in the 30th minute.
The first true save of the game came in the 40th minute, though, when Alexis Mac Allister's stooping header from an Angel Di Maria cross was well dealt with by Crepeau.
But Argentina needed their goalkeeper, Emiliano Martinez, to be at his very best to ensure they went in on level terms at the interval.
Cyle Larin's cross from the right wing was met with a powerful header from close-range from Stephen Eustaquio but Martinez's sharp reaction save kept the game goalless.
But it took less than four minutes of the second half for Argentina to break the deadlock -- Messi threaded a pass through to Mac Allister, who was brought down by Crepeau, but before the referee could blow his whistle Alvarez had slotted home the loose ball.
