Highlights: Novak Begins Chase For 6th Title At Nitto ATP Finals
Watch highlights as Novak Djokovic puts on a masterful display of returning to defeat John Isner on Monday at the 2018 Nitto ATP Finals. Alexander Zverev also squeaks by Marin Cilic in two tie-breaks. Photo Credit: Peter Staples/ATP World Tour. Watch live tennis at tennistv.com.