The futures of both players are in doubt.
"All my players are important, especially now that I am able to make five substitutions," Gattuso told DAZN.
“It was a good opportunity for Lozano today and next week it might be Amin Younes. I believe firmly that when you are part of a group, you must all work in the same direction, train at 100 per cent. I hold no grudges.
“It's reductive today to suggest Napoli were only solid and defended, because we took the initiative and played well. Few sides play as well as Verona, but we were excellent both in possession and off the ball.
“We're in good shape, we can pass it well and won't stand for conceding goals. We must improve when it comes to patience and not trying to force moves through, but I like the way the team plays."
He added: “Arek's contract is running down, he knows that I see few centre-forwards out there who we'd consider an improvement on him. He knows the respect I have for him, both as a player and a man."