Currently coach of Soon woo Kwon, the no.1 tennis player in South Korea
- Since the beginning of the cooperation, Kwon won Biella 125k, made two quarterfinals of ATP 250 (Singapore, Marbella), made his first semifinal of ATP 250 (Eastbourne), first time making the third round of a grand slam (Roland Garros), first time winning a main draw match at Wimbledon, and will be representing South Korea in the Olympics this year in Tokyo2020 
- Reached new career high ATP singles ranking of 69

Coached at TW Tennis in Coral Springs Florida, USA
- helped Ronnie Hohmann (no.1 player from LSU)

2014-2019 (Korea League)
After discharge upon completing military service, he was picked by the Team of Dangjin City as a leader, made a contract with the team, competed and was helping other players for 5 years in Korea
- Yongkyu Lim (Asian Game Gold medalist 2014)

2012-2014 (Korea League)
Served the Korean Sports military for 2 years
- Was Military Tennis Team Leader, served as captain over eight Korean professional tennis players

2011 (ATP Tour, ITF)
Played Professional Tour
ATP Career High in singles #326

Tennis Integrity Protection Programme (TIPP) by TIU

USPTA Elite Professional
PTR Professional
ATP Alumni

Daniel Yoo

Email: yootennis@gmail.com
Phone no.: +1-561-270-9133 (whatsapp) / +82-10-2212-3024 (Kakao Talk)