Frances Tiafoe battles back against fellow American Ben Shelton in five sets to advance to US Open's Round of 16 and a likely matchup with second-seeded Novak Djokovic

MATTHEW LAMBERT AT ARTHUR ASHE: Tiafoe came up with some big serves in a rematch of the quarter-final last year, which Shelton won. Tiafoe will go onto face Novak Djokovic or Alexei Poporin.