Marta, who has been playing in the US with Orlando Pride since 2017, hopes to make her sixth appearance at the Olympics at this year's Paris Games.
"If I go to the Olympics, I will enjoy every moment, because, regardless of whether I go to the Olympics or not, this is my last year with the national team," Marta told CNN in an interview on Thursday (Friday AEST).
"There will be no more Marta from 2025 in the national team as an athlete.
"I am very calm about this, because I see with great optimism this development that we are having in relation to young athletes."
Marta, affectionately known as "Queen Marta", is the all-time highest scorer for Brazil with 116 goals in 175 matches.
She is also the top scorer in the Women's World Cup with 17 goals, with the side finishing runners-up to Germany in 2007.
Marta has helped Brazil win three Copa America Femenina titles (2003, 2010 and 2018) and two Pan American Games (2003, 2007).
She was also part of the Brazil team that claimed silver medals at the 2004 and 2008 Games.
Marta has also achieved global individual acclaim, voted the world's best female player six times (2006, 2007, 2008, 2009, 2010 and 2018).
She began her club career with Vasco da Gama, followed by spells at Swedish sides Umea IK, Tyreso FF and Rosengard.
In the US, Marta has also played for Los Angeles Sol, Western New York Flash and Gold Pride.
- with AP
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