Marco Sangalli Fuentes (born 7 February 1992) is a Spanish professional footballer who plays mainly as a right winger for Racing de Santander. Born in San Sebastián, Gipuzkoa of Italian descent, Sangalli joined Real Sociedad's youth setup in 2001, aged nine. He made his senior debut with the reserves in the 2011–12 season, in the Segunda División B. On 24 August 2013, Sangalli made his first-team – and La Liga – debut, playing the last 13 minutes in a 1–1 away draw against Elche CF. On 12 July of the following year, he was loaned to Segunda División club Deportivo Alavés until the end of the campaign. Sangalli signed a two-year deal with CD Mirandés also of the second division on 26 June 2015. He scored his first goal as a professional on 12 September, helping to a 3–2 away defeat of Alavés. On 4 July 2017, after suffering relegation, Sangalli moved to AD Alcorcón in the same league after agreeing to a two-year contract. On 1 July 2019, he joined Real Oviedo still in the second tier on a two-year deal. He netted five times in the league for the latter in his first and second seasons. Sangalli signed an 18-month contract with Racing de Santander on 24 January 2023. In August 2024, after spending one month away from the club, he put pen to paper to a new one-year deal.