CiCi, youngest player in tennis Grand Slam for 9 years
Tennis player, CiCi Bellis, has wowed fans by winning her first match at the US Open.
At 15 years 152 days old, Bellis is the youngest player to feature in a Grand Slam main draw for over nine years.
She beat 12th seed Dominika Cibulkova at the tournament 6-1 4-6 6-4.
She will now face Zarbia Dyas of Kazakhstan, the world number 48, in the second round, but she cannot collect the US$60,420 (£36,518) prize money on offer as she is an amateur.
- CiCi is a nickname, her full name is Catherine Cartan Bellis
- She's from San Francisco
- She chose tennis over football at the age of 10
- She doesn't go to school but has lessons over the internet at home
After her win against Cibulkova she said:"I'm feeling amazing, I'm still speechless. I'm still in shock about that match."
"I went into the match thinking it was going to be such a great experience, but I never thought I would come out on top winning."