Alexander Zverev was knocked out of the Australian Open by South Korean youngster Hyeon Chung. Alexander wasn’t the only casualty of the 21-year old, older brother Mischa Zverev was also defeated. Chung will now face the winner between Novak Djokovic and Albert Ramos Vinolas. The South Korean took five sets to beat the German, winning the 2nd, 4th and 5th sets. Here is how Twitter reacted to the match.

Congrats Hyeon Chung! What a performance. Keep going! — richardcjy (@richardcjy) January 20, 2018

Hyeon Chung bout to blow up 🇰🇷🇰🇷🇰🇷 — Steven Kim (@stevenyk) January 20, 2018

https://twitter.com/Nikhil7Thole/status/954631769264766976

Sascha may be ranked higher, but prior to this match, Hyeon was already leading their H2H 1-0. Now, it's 2-0. Hyeon Chung is a talented player. He deserved this win. He did not get lucky. He knows how to beat Sascha. It's not really an upset, if you look at history, not rankings. — Big Fat Tennis Fan (@BigFatTennisFan) January 20, 2018

Making history. Hyeon Chung becomes just the third Korean player to make the R16 at a Grand Slam, ousting No.4… https://t.co/EmMUB0hFxE — Gsb Zambia (@gsb_zambia) January 20, 2018

So impressed with Hyeon Chung! He retrieved shots that seemed impossible and turned them around to win the points! Amazing! #ausopen — storme (@stormelaw) January 20, 2018

https://twitter.com/talltimbar/status/954627749552910336