Steffi Graf, she turned pro in 1982 at 13 years of age.
You can turn pro at any age. The ITF does not have an age restriction. Margaret Lumia turned pro at the age of 53 in Sep 2010. She has played quite a few matches and is currently ranked WTA 775
Roger Federer started at the age of 8, but did not turn pro until 1998, at the age of 17.
I believe you van become pro at age 14 or 15
A player can turn pro at any age.
He turned pro at age 16.
20.
Margaret Lumia turned pro at the age of 53 in Sep 2010 when she made it to the semi finals of the ITF tournament in Mazatlan Mexico. She had no professional or college play before this date.
No, but he does with his pro tennis daughter.
Calabasas Pro Tennis Championships was created in 2001.
Jimmy Connors Pro Tennis Tour happened in 1993.
Smash Court Tennis Pro Tournament was created in 2002.