Midfielder Ignacio Fernandez said that his team must fight in every match they play.
River Plate's squad is complete in Orlando after a third group of players arrived on flights from Buenos Aires and Santiago.
Alario, Mora and Larrondo were among the players who arrived at Hilton Hotel at 11:30 p.m. ET.
Some hours earlier, midfielder Ignacio Fernandez talked the importance of playing in the Florida Cup: "It' motivating. When you are in a club like River you must fight for every tournament this club plays. You've got to be at your best. We want that.