Bangkok: Quickfire goals from Mohammad Shamsi and Reza Karimi just after the hour mark saw former champions Iran record a 2-1 comeback win over Saudi Arabia at Rajamangala Stadium on Tuesday to qualify for the quarter-finals of the AFC U-16 Championship after maintaining their 100% record in Group D. Mashhour Abdullah had handed Saudi Arabia, who began their campaign with a goalless draw against Syria at the weekend, the lead just before the hour mark only for substitute Shamsi to equalise for Iran four minutes after the hour mark. And with Karimi netting his second goal of the tournament just a minute later, 2012 semi-finalists Iran followed up Sunday's 3-2 win over Qatar to secure a place in the quarter-finals as Group D winners with a game against Syria to spare. Simultaneously, Qatar will play Saudi Arabia in search of the group's second qualifying ticket.