Four goals from Asamoah Gyan put Al Ain through to the last-eight with a 5-0 win at home to Dibba Al Fujairah.
The Ghanaian striker struck two goals either side of the interval and Miroslav Stoch added a fifth after the hour as the Arabian Gulf League champions thrashed the newly-promoted second division champions.
Gyan played himself into space on the edge of the area when his back flick came back off his marker’s legs for the opener. He dodged two more defenders to get through on goal before burying the ball on 15 minutes.
Dibba Fujairah had two close calls either side of the half-hour mark, which both went wide of the goal. But the visitors’ attempts to find a way back into the game were short-lived.
Gyan chested down and tapped home a cross from Mohammad Ahmad for his second six minutes before the break and added his third after the interval, heading home Omar Abdul Rahman’s cross on 49 minutes.
A fourth came just four minutes later after Gyan scuffed Stoch’s cross from a quick counter-attack into the bottom corner. Stoch made it five after the hour when his curler from the edge of the box went in off the post.