Higuain equalised for the Italian side after Iker Muniain had given Bilbao the lead in the first half.
"The truth is I don't feel like talking right now. I want to rest and focus on the next game," he told Sky Sport Italia.
"Napoli have to play in the Champions League and we'll have to prepare well for the next match.
"We have to go there to win and Napoli have to do it, as we have the team to achieve this."
Higuain scored 24 goals for Napoli last season, helping the club to finish third in Serie A.