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Marcos Alonso is a Spanish left wing-back who currently plays for Chelsea. Born in Madrid on December 28, 1990, Alonso began his career with Real Madrid’s youth side. However, he only made one appearance for the first team, coming on in the 90th minute against Racing Santander in 2010. Next, Alonso moved to England with Bolton Wanderers, where he made 35 appearances during a three-year stint with the Trotters. In May 2013, the left-back signed for Italian side Fiorentina, despite being offered a new deal by Bolton, but returned to the Premier League on loan in 2014 when he joined Sunderland. He spent three years in Italy before returning to the Premier League for good with Chelsea in the summer of 2016 in a £30million deal.