But she was unfazed, hitting 54 winners in a 4-6 6-4 6-3 victory over title favourite Simona Halep to become Latvia's first grand slam singles champion.
- Halep broke unseeded Ostapenko's serve in the second game and consolidated with a hold in the third to take a 3-0 second-set lead.
Ostapenko had blasted her way into the final on the back of 245 winners - more than any other player in the draw, man or woman.
'But in the next couple of years I understood how to play, how to move and then I really liked it. Wimbledon is in three weeks and I'm feeling quite confident now so I'm really looking forward to playing there'.
The Romanian looked to be cruising towards the title at 3-0 in the second set but betrayed her emotions by throwing her racket to the clay when Ostapenko stopped the rot after a long game.
25-year-old Halep, who will be crowned world No 2 when the rankings are updated tomorrow, was gracious in accepting her defeat. "I just enjoy it so much". "We will see what is gonna be".
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.
The French Open may have been her first WTA title, but I doubt it will be her last.
"I think I still can not believe it, because it was my dream and now it came true", Ostapenko said. "I have to say a star is born", Evert, working as pundit for broadcaster Eurosport said. "Actually, it's something I can not understand". She also denied Halep what would have been her first major championship and the No. 1 ranking. "Hurts a lot and I need time just to, I don't know, to go away". Jelena won this match, Simona did not lose it. "I am proud of her!" said Vejonis, adding that she has demonstrated a unique achievement in Latvian sports.
"When I first played on it, I didn't like it at all".
She is also the first woman in 48 years to make a Grand Slam title her first title. I'm sad I couldn't win it but it was a great experience. "It was a little bit of like emotional moment, but that's it".
"I'm really happy to win here".
Jelena Ostapenko has produced an incredible performance against Simona Halep in the Roland-Garros final, belting a backhand victor for her first major title on Saturday.
Halep has had issues before with being too self-critical and coming down hard on herself, particularly during matches.
Halep took charge again early in the final set, getting the break at 3-1 after taking some pace off the ball and drawing an error, but again Ostapenko came straight back. She kept the faith and still tried for the winners against all odds, and when she was down and ought to be losing hope. I have full faith that one of these days she's going to hold one of these trophies'.
Halep's status in Romania is huge and she shoulders enormous pressure of expectation from her followers back home.
"I wish you good luck for the season".
Halep and her coach Cahill with Ion Tiriac the day before the final.
Rafael Nadal beat Austrian Dominic Thiem in three sets to reach his first French Open final in three years on Friday.
"I love you guys".
Ostapenko certainly was ready, sooner than even she could imagine. Victoria Azarenka, another former No. 1 and major champion, is supposed to return after having a baby, but it's tough to know what to expect from her.
She turned 20 during the tournament and was still a teenager when she lost the first set of her first-round match against Louisa Chirico of the United States. If she plays good, it's very hard that somebody can beat her.