Benitez said that Hazard's actions would be dealt with internally by the club, but it is another blow to the London club's reputation in a season already including the John Terry racism scandal, the Mark Clattenburg affair and the unpopular sacking of Roberto Di Matteo.
He said: "The ball boy has been in the dressing room talking with Hazard and they have apologised to each other. They know they were wrong, that's it.
"He was wasting time, Hazard was frustrated, he wanted to get the ball back quickly so they have both made a mistake and we cannot say too much.
"We will deal with this internally. We will analyse and wait to see if there is any action from the FA."
But Benitez reacted angrily when he was accused of attempting to condone Hazard's actions.
"I do not know what you expect from me," he said. "Do you think we are not disappointed with the situation, that we do not regret what happened? Do you think they have not apologised? They have done it so what can we do now? Do you want to change things? We cannot.
"The player spoke to the boy and he said sorry because it was a mistake so what else would you expect? We know it was a mistake but we talked with the player and the boy so what do you expect?
"The boy was with us in the dressing room and everybody was clear and we know there was a mistake.
"I think the police will do nothing."
A Chelsea spokesman added: "The boy was asked and he told the police he was not going to press any charges."