The victory was the Doha side’s eighth in a row on the continent and 20th in all competitions as the Qatar Stars League champions followed their 4-2 first leg win with an equally resounding performance as they continue to sweep all challengers aside.

Moroccan international El Arabi opened the scoring last week in Al Ain and the striker added another two to his tally at Abdullah Bin Khalifa Stadium to mean he is now the tournament’s joint top scorer on nine goals.

The hosts wasted no time in taking full control and were rewarded with a goal inside 11 minutes when Nam Tae-hee advanced down the left and sent a low ball across the goalmouth that was inadvertently converted by defender Mohamed Ahmad past his own goalkeeper.

Al Duhail doubled their tally at the half-hour mark through Youssef El Arabi who stabbed in Ismail Mohammad’s powerful cross from the right flank.

Very little changed after the break as the Qataris continued to attack in numbers and soon found the net for a third time. El Arabi sent defender Sultan Al Brake through on goal and the latter attempted to lob goalkeeper Khalid Eisa who was able to get his fingertips on the ball before it fell for Mohammad who tapped into the empty net in the 54th minute.

The Tehran side conceded in added time in last week’s first leg as a 1-0 defeat in Isfahan left them with plenty to do at Azadi Stadium, where more than 75,000 fans generated a fantastic atmosphere at the Islamic Republic of Iran’s national stadium.

Thiam put the hosts in front from the spot shortly after the 10-minute mark to level the tie on aggregate, before the Senagalese forward’s stunning left-foot effort from distance put them 2-0 on the night four minutes before the interval.

Algerian striker Baghdad Bounedjah was again the man of the hour for Qatar's Al Sadd. In their Round of 16 second leg against Saudi Arabia's Al Ahli, the 26-year-old netted his eighth and ninth goals of the 2018 AFC Champions League to ensure a 2-2 draw on the night and a 4-3 aggregate win for Al Sadd.

After a 96th-minute Al Jazira goal saw the Emirati side claim a 3-2 win in the first leg in Abu Dhabi last week, Persepolis went into the return meeting needing a win to have any chance of progressing to the quarter-finals for the second successive year.

The hosts dominated but had to wait until just after the hour to take the lead through Ahmad Nourollahi’s stunning effort from distance, only for Brazilian Romarinho to level and silence a packed Azadi Stadium shortly after.

But Persepolis kept pushing forward and eventually got the winner their performance deserved when Hosseini, who was suspended for the first leg, fired home from 15 yards after Al Jazira had failed to clear a delivery from the left.

The two-time continental champions lost the first leg 3-2 in Thailand but Son Jun-ho’s stoppage-time away goal had left the K League 1 side in a strong position ahead of the reverse fixture at Jeonju World Cup Stadium.

Ricardo Lopes volleyed home a superb opener inside 20 minutes to ease any nerves on Tuesday and, after dominating the game, Lee Jae-sung curled in a fabulous free-kick with six minutes remaining as Jeonbuk sealed a 2-0 victory to return to the last eight.

The Chinese Super League teams played out a scoreless draw in Tianjin last week to mean an away goal on Tuesday could leave Guangzhou in real trouble, and that was exactly how the match panned out as a 2-2 draw at Tianhe Stadium saw the visitors advance on away goals.