When the AFC Champions League wheels resume turning with the last eight, some teams will have a new look, with new managers and players joining over the summer, while for others, stability is the key weapon as they pursue continental glory.

Jeonbuk’s Lee Dong-gook and Suwon’s Dejan Damjanovic are the two leading scorers in AFC Champions League history with 36 and 32 goals respectively, since the 2002-03 revamp.

And, although with a combined age of 76, they still remain among the goals in the 2018 campaign.

For the first time since the introduction of the East v West final in 2013, all four teams in the West Asian quarter-finals come from just two countries, offering us the opportunity to watch two tasty IR Iran v Qatar encounters, as Tehran giants Estaghlal and Persepolis face Al Sadd and Al Duhail respectively.

Throughout the years, teams from the two nations have produced some classics when they met. Here are four memorable matches between them from recent editions of the competition.

Domestic rivalries add a new dimension to the AFC Champions League, and throughout the years we have enjoyed some classic at the quarter-final stage. Heroic comebacks, nervy draws and closely fought contests were all present. Interestingly, never have two West Asian sides from the same country met in the competition's quarter-finals. So, here are four times rivals clashed in the last eight in recent years.

Debut strikes, stunning volleys and smart chips, the AFC Champions League quarter-finals has produced some memorable goals throughout the years. Here we recall some of the best goals scored at this stage of the competition, hoping this year's edition will deliver more of the same.

Having won an incredible four UEFA Champions League titles with Barcelona as part of what was arguably the greatest club side to ever play the game, Spanish midfielder Xavi Hernandez was a huge coup for Al Sadd when he joined in 2015.

By the time the quarter-finals rolled around last year, Omar Abdulrahman led the AFC Champions League scoring race with seven goals but Omar Khrbin eventually won the prize with 10 goals. This year, we have not one, but two players who have already hit nine goals ahead of the quarter-finals; Baghdad Bounedjah and Youssef El Arabi.

While seven-goal man Mame Baba Thiam has swapped Esteghlal for Ajman in the UAE Pro League, two players continue to keep the pressure on the North African duo. Dejan Damjanovic and Kim Shin-wook are both on five goals, but only one of them will advance into the semi-finals as their teams clash in the last eight.