The 20-year old, a virtual unknown before the start of Roland Garros, fired 54 winners and 54 unforced errors past Simona Halep in her 4-6, 6-4, 6-3 win on Saturday, June 10.
The world No. 47 became only the second unseeded woman to win the French Open after Margaret Scriven in 1933 and the first player from her nation - population of about 2 million - to claim a major.
Latvia's Jelena Ostapenko celebrates winning her semifinal match against Timea Bacsinszky of Switzerland in three sets, 7-6 (7-4), 3-6, 6-3, of the French Open tennis tournament at the Roland Garros stadium, in Paris, France. When she'd miss, she would slap her thigh or crack her racket on the red clay or raise a palm as if to say, "What was up with that shot?" The tournament has always caused an upset to top seeds every now and then both in Men's and Women's championships since it is played in the hard court.
"Of course", she said, "I didn't expect that when I came here".
"When I was in Auckland I really wanted to jump from the tower but my mum really did not want me to do it because she felt it was kind of unsafe".
She said: "I knew I'm already in the final and I'm playing such a great player as Simona".
Ostapenko certainly was ready, sooner than even she could imagine. "She deserved to win, played really well, all the credit".
She has more titles in sight, vowing to stay true to her fearless, big-hitting game.
The key game of the set came on the Halep serve at 4-4. She was hitting very strong.
"To play the final, it's an wonderful thing. It's odd.' But then in the next couple of years, I understood how to play there, how to move there, and then I really liked it".
Asked when she realised her daughter had so much power, Jelena Jakovleva said: "The day she was born".
JELENA JAKOVLEVA, Ostapenko's mother, recalling her daughter's self-fulfilling prophecy, made 10 years ago. "Now I really like it". "I think I'm going to only understand that in maybe couple of days or couple of weeks". Against serve, she blasted four consecutive points to register a quick break and send out a warning to her more experienced rival.
And, if all that wasn't historic enough, Ostapenko is the first Latvian, man or woman, to ever win a Grand Slam event. "I was a little bit nervous but then I felt I have nothing to lose, so I'm just going to enjoy the match and do my best", she admitted.
"It's a tough moment for me, but it's gonna go away, I hope, with time".
Ostapenko was playing in only her eighth Grand Slam tournament and never had been past the third round before.
The psychological effect her attacking style has on her opponents is hard to quantify.
"Nobody taught me. It's just the way I play".
It was a match filled with wild momentum swings between two players displaying completely disparate styles: Ostapenko's grip-it-and-rip-it approach vs. Halep's more conservative keep-the-ball-in philosophy.
From Halep's point of view her first time out of the gates at a Slam final, she was surrounded by an entourage of around 50 family and friends, and this time she kept it simple - and it nearly worked.