A brace from Dominic Calvert-Lewin saw Leeds claim a remarkable comeback victory as they beat Liverpool 4-2 in Chicago.
The former Everton man scored two headers from two long throws, while Brenden Aaronson and Sean Longstaff also got on the scoresheet to overturn first-half goals from Luke Chambers and Florian Wirtz.
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Liverpool were bolstered by the return of Alexander Isak, Florian Wirtz and Ryan Gravenberch after their World Cup exploits.
The trio had yet to feature in the Reds' preseason campaign, but each got 45 minutes in Sunday's defeat.
"I think we've been cautious in terms of giving them the time to reach to the level where the others are, because they've been training for two weeks before them, but my idea is that the three of them will play the last game against Leeds," Iraola told club media before the game.
Liverpool began their tour with a topsy-turvy 4-2 victory over Sunderland, with Kieran Morrison, Dominik Szoboszlai, Federico Chiesa and Lewis Koumas finding the net for the Reds, while Enzo Le Fée and Timur Tutierov scored for the Black Cats.
Iraola's side were not at their fluent best in their second game against Wrexham in New York, but a deflected strike from Rio Ngumoha was enough to claim victory over the Championship side.
Leeds, meanwhile, faced the same opposition in reverse order. They began with a 3-2 defeat to the Welsh side despite goals from Joël Piroe and Sean Longstaff, but bounced back with a victory over Sunderland in which Lukas Nmecha grabbed the only goal.