Lima strikes for Al Ahli in Tehran

At the Azadi Stadium in Tehran, former Benfica player Lima scored the only goal of the match with a diving header to give the Emiratis the upper hand ahead of their quarter-final second leg on September 16 in Dubai.

Coached by Cosmin Olaroiu, Al Ahli are aiming to become only the second UAE side to win the lucrative tournament after Al Ain claimed the inaugural title in 2003.

Naft Tehran had their chances but were constantly under pressure from Al Ahli, especially in the second half, and conceded the advantage just after the one hour mark when Brazilian Lima came up with a fine header after the ball was flicked into the six-yard box by Walid Abbas off a corner taken by Everton Ribeiro.

Earlier, Lima -- who has on three occasions finished on the losing side in the Europa League final once with Sporting Braga and twice when at Benfica -- had missed a fine scoring chance, heading just wide from a perfect pass from the right by Ribeiro.

Al Ahli survived two close calls immediately afterwards but held on to clinch the advantage when they play the second leg in front of their home fans next month.

Earlier on Wednesday, Jeonbuk Hyundai Motors and Gamba Osaka played out a scoreless draw in the first leg in Seoul.

In an entertaining match, Jeonbuk captain Lee Dong-Gook missed the best opportunity of the game midway through the second half, turning the ball narrowly wide of an open goal

The teams will meet again in the return match in Japan also on September 16, with the winners advancing to meet either Chinese champions Guangzhou Evergrande or Japan's Kashiwa Reysol in the semi-finals.

Guangzhou are in firm control of that tie after a 3-1 win at Kashiwa in the first leg on Tuesday.

Jeonbuk won a 3-2 thriller when they last hosted Gamba in the competition nine years ago and the Korean side dominated possession in the opening half, outshooting their opponents by a wide margin.

However, they could not find a way through the visitors’ defence with Lee, the competition’s all-time leading scorer with 27 goals, missing their best chance just before half-time when he headed Choi Chul-Soon’s cross narrowly wide.

Gamba came more into the game after the interval and nearly broke the deadlock in the 58th minute with a shot on the turn by Patric that went just off-target.

But the best opportunity fell to the hosts in the 65th minute when they carved open the Gamba defence on a swift counter-attack initiated by Luiz Henrique on the left.

The Brazilian played in Park Won-Jae, who turned the ball past goalkeeper Masaaki Higashiguchi to an unmarked Lee. He stretched to make contact with the ball but failed to turn it into the gaping goal.

Higashiguchi was called into action with 12 minutes left when he made a fine stop to turn aside Leonardo’s fierce low drive from 25 metres as the teams settled for a goalless stalemate ahead of the second leg at Expo 70 Stadium in three weeks time.