DOHA: A brilliant first-half on Sunday goal by Ahmed Kanu helped Second Division side Mesaimeer beat Al Sailiya in their Emir Cup clash.   Mesaimeer now have moved into the quarter-finals of the prestigious tournament.   The expierenced Omani midfielder struck with five minutes to go for the first-half whistle, which turned out to be the only goal of the match.   Mesaimeer now take on Al Gharafa in the last eight clash on May 4.   Coach Dragan Tadic's side, having defeated QNB Stars League (QSL) outfit Al Ahli in the first round match, on Sunday impressed with another well-coordinated display.   The second division outfit attained success on the goal front through a combined move initiated by Robert Brito Luciano and Kanu.   The Brazilian beat the challenge of a rival defender and essayed a cross which found an unmarked Kanu at the far post. The Omani wasted no time in finishing the move with a brilliantly executed side volley which beat Al Sailiya keeper Abdraman Mahamat Aziz all ends up.