"Today at the breakfast table, we were watching the other semifinal between Bing Jiao and Chen Yu Fei. We knew she smashes very well and her dribbles are also good so Sindhu will have to be careful of her net play," he said.
Park said the bronze medal won by Sindhu not only fulfilled the aspirations of India but also realised his own dream of claiming an Olympic medal.
"It is the first time that India badminton player has won two Olympic medals in badminton, so it is a great achievement not only for Sindhu but also a big moment for my teaching life," Park said.
"It is an important moment for my leadership career because as a player and coach I never won an Olympic medal. So it is a first for me too. I am very happy, can't express myself," the coach said.
The 42-year-old South Korean had claimed the Asian Games gold medal in 2002 during his international career as a player before turning to coaching in 2013.
He served as a national coach of the Korean badminton team for five years from 2013 to 2018 before being roped in for India's men's singles players but after the abrupt departure of women's coach Kim Ji Hyun, he took over the charge of training Sindhu in late 2019.
"I have been getting constant congratulatory messages and calls from my family, friends, my sister, all of them have been watching and supporting Sindhu."
With this medal, the 26-year-old Sindhu also became the fourth shuttler to win two consecutive medals in women's singles in Olympic history.