She fired three goals past Panama and set up another with a brilliant back-heel flick to get Brazil off to a winning start.

Borges, who plays for National Women's Soccer League club Racing Louisville, called it "one of the happiest days" of her life.

"I couldn't have imagined this in my wildest dream," Borges, who could not hold back the tears after her first goal, told reporters after the win.

"The debut in the World Cup in itself was a very special moment for me, just to be here. It's very special to be able to score three goals in a World Cup in my first game, but this is just the beginning of a long walk that we have ahead of us.

"The day was full of emotions. I think I had all the highs and lows that a human being can have. I was very happy. I was very nervous. I cried. I smiled... If anybody told me beforehand that I was going to score three goals on my debut I would have laughed in their faces."

With her three goals, Borges became the fourth player to score a hat-trick in a Women's World Cup game for Brazil after Pretinha, Cristiane and Sissi, and the first to do it on her debut.

"I'm very happy to be part of this select group of players who have managed to score three goals in the World Cup...," Borges said.

"If I'm here today it's because these women have fought a lot for football in our country. So this is a very special moment to be able to be part of this, to be living this moment. It's a very nice story that I will be able to tell my family."

Borges was named Player of the Match for her incredible performance, receiving the trophy from Brazilian veteran Marta, who is playing in her sixth Women's World Cup and has scored a record 17 goals in the tournament.

Borges said she had asked to be awarded the trophy by Marta, adding: "Sometimes she doesn't even realise how much we admire her.

"She is truly a person that motivates us. So sharing this moment with her is very special for me. I admire her a lot."