Brian Windhorst is joined by ESPN's Tim Bontemps and Tim MacMahon to preview the NBA Finals between the Mavs & Celtics. The guys talk Kristaps Porzingis facing off against his former team, how Boston will approach guarding Luka in this series, why the Celtics' defense is tough to handle, the pressure Tatum faces in this series and more! Learn more about your ad choices. Visit megaphone.fm/adchoices