The stand-in Barcelona trainer lauded yet another masterclass from the Argentine forward, who scored his 300th goal for the club, and pledged his support to Alexis Sanchez
Ighalo opened the scoring for the Andalusians in the first-half, but the Argentine conjured two goals later on - including his 300th for the Catalan giants - to inspire his side to a 2-1 victory.
"Messi's record is just another one," he told reporters after the match. "Today we were goal-shy, and he managed two. It's something extraordinary.
"On the bench you're always nervous when you see the result in the balance. We suffered, and logically so. Perhaps at certain stages, we lacked something, knowing the difficulty of facing our opponents.
"Keeping clean sheets is one of the areas in which we have to improve. We should have kept them a little more quiet, but then let us not forget Granada played well."
The 45-year-old opted to start the out-of-form Alexis Sanchez as he rested several first-team stars ahead of their Champions League tie with AC Milan next week, but the Chilean once again came under criticism.
"The other day he scored [against Getafe last week], and it's true that today, he failed. We will continue to try to help and encourage him because we have always said that his attitude is very good," he continued.
"He won't have problems."