'Congratulations with your magnificent victory,' Henin said.
'Once again, Jada can be very proud of her mama. Your achievement is just fantastic! Warm applause to you and your whole family.'
Henin won a total of 41 WTA Tour titles and held the world number one spot for 117 weeks in total. Henin announced her retirement on May 14, 2008, saying she was 'at the end of the road' and wanted to devote more time to life away from tennis.
'Now I've been playing tennis for 20 years and it's been my whole life but as a woman, as you get older, you need to think about the future,' she said at the time.
'A new future is ahead and I won't go back on this decision.'