Demarai Gray scored on his first Everton appearance as fellow new arrival Asmir Begovic proved the hero in a 10-9 penalty shootout victory over Millonarios in the Florida Cup.
Winger Gray, 25, who joined from Bayer Leverkusen for £1.7m on Thursday, converted a 64th-minute spot-kick to cancel out Andres Llinas' opener.
Former Bournemouth goalkeeper Begovic, 34, scored before saving Juan Moreno's strike to seal victory in the shootout.
Andros Townsend also made his debut.
The 30-year-old, who joined on a free transfer after his contract at Crystal Palace expired, hit the woodwork as Everton chased an equaliser and was replaced by Gray for the second half in Orlando.