Hi mainaliji...
The tickets can be bought from Al Jazeera Sports Channel website (http://www.aljazeerasport.net/) or directly through this link (http://buy.tickethour.com/qfa-ww/showProductList.html)
Or you will find them in main shopping centers (City Center, Landmark, Villagio, The Mall, Souq Wakef).
Enjoy it buddy :)