In the high altitude of La Paz, Argentina sealed a comfortable 3-0 victory over Bolivia to ensure a perfect start to their World Cup qualifiers.
Enzo Fernandez, Nicolas Tagliafico and Nicolas Gonzalez all scored as the hosts went down to 10 men in the first half, with Lionel Messi watching on unused.
Mac Allister played 85 minutes in midfield alongside Fernandez and Rodrigo de Paul, and showed his composure and class on the ball with a number of incisive passes.
The 24-year-old was also tenacious off the ball, with Angel Di Maria (12) the only Argentina player to win more duels than his five and no outfielder recording as many recoveries as his eight, per FotMob.
After being replaced by Leandro Paredes late on, Mac Allister received praise from journalists in his native country, including Ole
