By Ishaan Bhattacharya Gregg Popovich was asked about his inevitable retirement from basketball, but Pop decided to give a hilarious response. Gregg Popovich is arguably the single-greatest coach in NBA history, with an incredible career that spans over 25 years. While we have coaches like Phil Jackson, who was unmatched at his peak, Popovich’s longevity in the league has been incredible. Despite the San Antonio Spurs being in a clear rebuild for the first time in Pop’s career, the coach is happier than ever. People expected Pop to retire when the Spurs’ playoff window closed after 2019 but he…