Neither of these teams could shoot straight during their opening games of this tournament. Portugal got just five out of 21 shots in target against Zambia, and missed some sitters along the way. Costa Rica fired 15 times at Iran's goal, and didn't get a single one on frame. Assume both teams have been working on their shooting since their last match.
Portugal's roster is among the strongest in the tournament, with a core of players from Benfica's 2016-17 UEFA Youth League finalist squad. The team was expected to be challenged by Zambia, and a 2-1 loss to the CAF qualifying champion doesn't mean Portugal is worse than expected, just that the Zambians are as good as it was thought they might be.
Costa Rica has strengthened its team since the CONCACAF U-20 Championship, adding rising star Gerson Torres to its roster. But Los Ticos are very much second-favorites in this game, and their 1-0 loss to Iran didn't do anything to shake the impression they are the weakest CONCACAF team in this tournament.
Per livesoccertv.com, here's where to find the game: