Wenger, who was appointed Gunners manager in September 1996, added: "I could be tired because I get up early in the morning."
The Frenchman is the Premier League's longest-serving manager and his current contract expires at the end of the season.
He last won the Premier League title in 2004 and has been under pressure at the Emirates following league defeats by Watford and Chelsea.
However, after his side's 2-0 win against Hull, he added: "I focus on what is important: winning football games and getting the team to perform. The rest, I cannot influence.
"I have big respect for this country and this club, and I am grateful because I have worked here for 20 years. My job is to make these people happy and when I don't do that I feel guilty - that's why it's important for us to win."