The death on Thursday of the Brazilian pianist, songwriter and arranger was confirmed in a statement by his family on Friday.
"His wife and musical partner for the past 54 years, Gracinha Leporace Mendes, was by his side, as were his loving children," the statement said.
"Mendes last performed in November 2023 to sold out and wildly enthusiastic houses in Paris, London and Barcelona."
Mendes was born in Niterói, Rio de Janeiro's sister city, and studied classical music at a conservatory before joining jazz groups. In the late 1950s and early 1960s, he began playing Bossa Nova as the genre was heating up in Rio's nightclub scene with Antonio Carlos Jobim, João Gilberto and others.
In 1962, they travelled to New York for a Bossa Nova festival at Carnegie Hall. During the trip, Cannonball Adderley invited Mendes to collaborate on the album Cannonball Adderley And The Bossa Rio Sextet, leading to his first American record, The Swinger From Rio, after signing with Atlantic Records.
Two years later, Mendes moved to California and formed Brazil '64, which evolved into Brazil '66 after he added two female vocalists. The group's debut album, produced by Herb Alpert, featured Mas Que Nada. Sung entirely in Portuguese, it was a mid-tempo Samba number originally released in 1963 by composer Jorge Ben Sor, and updated three years later by Mendes, who had been playing the song in clubs and gave it a jazzier, more hard-hitting feel.
"I put a band together called Brasil '66," he told The Guardian in 2019.
"I'd always had instrumental groups, but when I added the two female singers - Lani Hall and Bibi Vogel it made a different kind of sound. We recorded the song in Los Angeles, with me, the drums, bass and guitar all performing live."
Mendes' version was a worldwide hit that helped perpetuate the Brazilian music boom of the 1960s. In 2006, a modern version of the song topped US charts, as performed by Black Eyed Peas. It was included in his album Timeless, produced by will.i.am and also featuring Stevie Wonder, Justin Timberlake and John Legend, among others.
"Sergio Mendes was my brother from another country," trumpet player Alpert wrote on Facebook, along with a photo from decades ago, sitting next to Mendes at the piano.
"He was a true friend and extremely gifted musician who brought Brazilian music in all its iterations to the entire world with elegance."
Mendes' other hits were an eclectic blend ranging from covers of the Beatles' The Fool On The Hill and With A Little Help From My Friends, to his own Brazilian chant, Magalenha Mendes also composed the soundtrack for the film Pelé, featuring saxophonist Gerry Mulligan, and even produced an album recorded by the great Brazilian soccer player.
Mendes won the 1992 Grammy Award for Best World Music Album for Brasileiro and two Latin Grammy Awards. He also received an Oscar nomination in 2012 for Best Original Song for Real In Rio, from the animated film Rio.
"Brazilian soul was there," pianist, singer, and songwriter Marcos Valle told GloboNews about Mendes' music. Valle also noted that it was Mendes who helped open doors for other Brazilian artists of his generation, including himself, to reach foreign audiences.
Mendes' family said they will provide details regarding funeral and memorial services at a later date.
