Team Wellington took a three-goal lead against Al Ain, but were ultimately beaten as the UAE Pro League champions prevailed on penalties.
Al Ain came from three goals down to beat Team Wellington on penalties and reach the second round of the Club World Cup.
The OFC Champions League winners surged into a 3-0 lead against the UAE Pro League champions, but goals either side of half-time got Al Ain back in it before Marcus Berg forced extra time, with the teams then unable to be separated until Wellington captain Justin Gulley saw his decisive penalty saved by Khalid Eisa.