Alex Sandro Lobo da Silva (born 26 January 1991) is a Brazilian professional footballer who plays as a left-back for Campeonato Brasileiro Série A club Flamengo.

The club mounted a comeback that started with a last-gasp Turin derby win on 31 October, with the Brazilian left-back playing a key role in that upturn.

He came on as a substitute for Patrice Evra in the Coppa Italia final against Milan at the Stadio Olimpico in Rome, which was decided by an Álvaro Morata lone goal in extra time.

The one trophy that evaded Alex Sandro was the UEFA Champions League, which saw his side lose 4–1 in the final to holders Real Madrid at the Millennium Stadium in Cardiff.

Alex Sandro played a key role in Mario Mandžukić's temporary equaliser in the first half, supplying the cross that was chested down to the Croatian by Gonzalo Higuaín.

[20] Prior to the final he had played a vital role in the Bianconeri's run, especially in the quarter-finals against Barcelona, where excellent defensive performances helped to neutralise the attacking threat of Lionel Messi, and enabled Juventus to keep clean sheets across both legs of the tie.

[26] On 24 August 2019, on the opening match day of the 2019–20 Serie A season, Alex Sandro assisted Giorgio Chiellini's goal in a 1–0 away win against Parma.

[28] On 25 May 2024, Alex Sandro scored the last goal of the season for Juventus from a header in his final game for the club, helping his side to a 2–0 Serie A victory against Monza, which saw the team finish in third place in the league, qualifying for the Champions League the following season; during the match, he made his 327th appearance for Juventus, equalling Pavel Nedvěd's record of the most appearances for the club by a non–Italian player.

[33] Alex Sandro debuted in a Campeonato Brasileiro Série A match between Flamengo and Vasco da Gama, held on 15 September 2024, that ended in a 1–1 draw.

[34] Alex Sandro is a part of the golden Atlético Paranaense youth setup, which has produced a great amount of defenders in very little time, with Raul, Manoel, Ronaldo Alves, Carlão and Bruno Costa all making themselves known in 2009.

After being a part of the Brazil under-18 setup, Alex Sandro was called up to the under-20 side in August 2009, alongside teammates Raul, Renan Foguinho and Gabriel Pimba.

[40] In the quarter-final match against Paraguay on 27 June, he once again made a substitute appearance, replacing the injured Filipe Luís at half-time; following a 0–0 draw, Brazil advanced to the semi-finals 4–3 on penalties.

[44] Alex Sandro is a quick, energetic and offensive minded defender, who is also a strong tackler and a good reader of the game, courtesy of his speed and anticipation.