Krejcikova, the 31st seed, triumphed 6-2, 2-6, 6-4 to claim the 2024 All England Club title, adding to her 2021 French Open victory.
Her win comes 26 years after her mentor Jana Novotna, who passed away from cancer in 2017, won the Wimbledon title.
“Before she passed away, she told me to go and win a Slam. I did that in Paris in 2021, but I never dreamed of winning the same trophy that Jana did,” said the 28-year-old Krejcikova, who clinched the title in a tense final service game on her third championship point.
“It’s unreal what just happened. The best day of my tennis career and the best day of my life.
“I was just telling myself to be brave. It was such a difficult match, a great final, a great competition, and I’m super happy to be standing here enjoying this moment.”
Krejcikova, who will return to the top 10 following her victory, entered Wimbledon after a challenging season. A back injury and illness had left her winless on the tour from February until June.
“I was injured and ill and didn’t have a good start to the season, and now I’m a Wimbledon winner. How did that happen?
“I think nobody’s going to believe I won Wimbledon. I still can’t believe it. Two weeks ago, I had a very tough first-round match, 7-5 in the third set, and I wasn’t in good shape.”
The result means seventh-seeded Paolini has lost two Grand Slam finals back-to-back, after coming off second best to Iga Swiatek at the French Open last month.
“I’m a little bit sad, but I try to keep smiling. I have to remember today is still a good day,” said Paolini, who had never won a grass-court match in her career until last month.
“I remember watching Wimbledon as a kid, cheering for Roger Federer, so to be here now is crazy. It’s been a beautiful two weeks.”
She added: “Barbora, you played unbelievably. You play such beautiful tennis. Congrats to you and your team.”
Krejcikova set the tone at the start of the match by breaking the Italian in the opening game and backing up the advantage with a hold to love.
Paolini, the first Italian woman to reach a Wimbledon singles final, had to save two break points in the third game but cracked under the strain again as the composed Czech stormed into a double-break lead for 4-1.
Krejcikova moved to three set points in the eighth game and needed only one as Paolini sent a backhand return into the net.
The nerve-wracked Italian managed to claim just four points on the Czech’s serve in the 35-minute opener. Krejcikova hit 10 winners to the Italian’s five.
Paolini dashed off Centre Court for a bathroom break and returned re-energized. She had also dropped the first set in her marathon semi-final triumph over Donna Vekic and on Saturday launched another second-set fightback.
Breaks in the second and eighth games leveled the final after a set in which Krejcikova made 14 unforced errors to seven for her opponent, taking her double-fault count to a tournament-high of 33. The Czech managed just four winners in the set as she went spectacularly off the boil.
However, momentum shifted dramatically back in her favor in the decider when Paolini double-faulted to surrender a break and fall 3-4 behind. Krejcikova held to love for 5-3 but endured a nervy conclusion, requiring three championship points and saving two break points in the 10th game to seal the title.
