Having already reached a new milestone by qualifying for their first-ever quarter-final, Al Nassr will have to hold on to their 2-1 home win from the first leg if they are to eliminate the 2011 AFC Champions League winners.

A fortnight ago in Riyadh, Rui Vitoria’s men had overturned an Ali Asad goal for the Qataris to walk away with a valuable victory thanks to goals from Abdulrahman Al Dossari and Giuliano either side of the half-time break.

Al Nassr will go into the tie at the Jassim bin Hamad Stadium in Doha protecting a 2-1 lead in what promises to be an epic encounter between the league champions of Qatar and Saudi Arabia.

Both had good news to celebrate during the international break with midfielder Nam Tae-hee having resumed training for Qatar Stars League champions Al Sadd while Moroccan forward Abderrazak Hamdallah saw game time for Al Nassr in the Saudi Pro League clash against Al Shabab on Friday.

Ali Asad had given the Qataris a 21st minute lead but it was countered by Abdulrahman Al Dossari’s close range strike a minute from the break, before Giuliano sealed the win for Al Nassr with a fine header in the 72nd minute on Tuesday.

Making their first-ever quarter-final appearance, Al Nassr were hopeful of securing their first win over Qatari opponents in the competition, but had their work cut out for them by a late injury to star striker Abdelrazzaq Hamdallah.

In turn, Al Sadd needed a positive result from Riyadh to set them up for an easier task at home as they chase a second consecutive semi-final.

The last eight tie is finely poised after the first leg of the 'Saudi Clasico' ended 0-0 three weeks ago and Chilean Villanueva, speaking after Al Ittihad fell to a shock 2-1 defeat to Damac in the Saudi Pro League on Friday, said the Jeddah-based club can't afford a similar performance against Al Hilal.

All four quarter-finals are finely poised with only Saudi Arabia's Al Nassr ahead on aggregate - albeit by just one goal - after the first meetings last month.

As such, Qatar's Al Sadd, Saudi pair Al Hilal and Al Ittihad, Urawa Red Diamonds and Kashima Antlers of Japan along with Chinese Super League duo Shanghai SIPG and Guangzhou Evergrande all remain in the running for a place in the final four.

Today (September 12) marks two years to the day since the Chinese giants clashed in one of the most dramatic second-leg encounters in the competition’s history on a truly memorable night at theTianhe Stadium. The-AFC.com looks back at how events unfolded.