Latvian sensation, Jelena Ostapenka has stunned world No.4 Simona Halep to claim her first Grand Slam crown.

Ostapenko, who turned 20 this week, defeated Halep 4-6, 6-4, 6-4 to continue her giant killing run at tournament.

She is also the first unseeded woman to win the French Open since 1933 and the win is her first title of any kind.

Ostapenko stuck her incredibly attacking style which saw her claim some huge scalps en route to the final, as she hit 54 clean winners, as well as 54 unforced errors during the final.

"I mean I can't believe I'm champion at 20," Ostapenko said post-match.

"I knew that Gustavo Kuerten won his first Roland Garros the day I was born, I have no words.

"There were a couple of games when everything went my way and I was ready to fight for every point."