Wimbledon has seen major upset during the first week of the tournament. Several top players such as Naomi Osaka, Venus Williams, Alexander Zverev, Stefanos Tsitsipas and Stan Wawrinka are already beaten.
Meanwhile, Kei has beaten Steve Johnson of America, 6-4, 6-3, 6-2. At this year's Wimbledon, Kei hasn't lost a set.
At previous grand slams in France and Australia, he had several full-set matches with tie breaks, and he managed to win them eight times in a row. The Association of Tennis Professioanls (ATP) called him, "the best deciding-set player in the Open Era".
Kei will face Kazakhstan’s Mikhail Kukushkin on 8th July, around 10:30pm (AEST).