Deaf junior player on AO

[DanaKz]

14 y.o. Lee Duck-Hee from Korea is #63 in ITF Junior Ranking lost in second round to Christian Garin(9). Sounds bit ordinary, but there is something special - this boy is deaf
http://uk.reuters.com/article/2013/0...0AQ1LW20130121

They say umpire didn't know the player was deaf:

According to the Australian Open, officials received no specific direction before the match to let them know Lee is deaf but on a number of occasions, umpire Thomas Sweeney used his hands to communicate.

Article about him from 2009
http://tenniskalamazoo.blogspot.com/...points-in.html