In which Zverev lost the first point on serve but Chung held serve and conceded the third point. Two aces gave Zverev the lead 3-1 and Chung held serve for a tally of 2-4 into the changeover. Chung won his service game to lead in the fourth set and achieved his first service break of the match to lead 2-0. Down 0-40 in the fourth game, Zverev fired aces and service winners to register on score board. When Hyeon Chung won the maiden Next Generation Tournament in November last year, many considered it a stepping-out moment.

Source: The Guardian January 21, 2018 02:37 UTC