"Richard Dunne has held his hands up. He has reacted to a challenge," Hughes said after the match.
"It was the second time Zaki had caught him across the face. He has retaliated, the referee has seen it and we accept it.
"It has been a difficult week preparing the team considering the interest about Kaka around the club, But we really stuck at our task.
"We had to dig in and beat a side that has been in arguably as good form as any recently in the Premier League."