The Saudi Arabian club are looking to move one step closer to avenging their 1-0 loss to the Western Sydney Wanderers in last season's final by booking their spot in the quarter-finals.
Al Hilal will be without suspended midfielder Salman Al Faraj in the second leg, Donis believes that his side can get the job done.
"We gave a good performance and created a few opportunities, but unfortunately the result didn’t go in our way," Donis told reporters.
"We tried our best to get a positive result, but we were a little bit unlucky. We can make things up in the return leg and I believe my team have the ability to qualify for the quarter-finals."