Del Neri has been heavily criticised for the club's struggles, but Matri is backing the Juventus tactician.
"Del Neri chose me and he had faith in my abilities," said the January loan signing from Cagliari.
"I know the Coach as the man that he is and I will defend him.
"The tactician is not to blame for this situation. It's just easier to put the blame on one person rather than on everyone."