Sixth seed Hyeon Chung won the NextGen ATP Finals in Milan, Italy on Saturday by defeating top-seed Andrey Rublev in four sets and the win was his fifth in a row meaning he was the only player to win all of his matches at the event. The NITTO ATP World Tour Finals got underway yesterday with Roger Federer winning his opener against American qualifier Jack Sock as expected. At the time of writing third seed Zverev was due to get his campaign underway against fifth seed Cilic. Today’s Pete Sampras Group A action features world number one and top-seed Nadal against seventh seed Goffin and fourth seed Thiem and sixth seed Dimitrov.