Spanish · Madrid, Spain · Born 28 December 1990Spanish left-back known for his attacking prowess and set-piece expertise, winning Premier League, Champions League and Europa League with Chelsea.
Marcos Alonso Mendoza was born on 28 December 1990 in Madrid, Spain, into a football family — his father, Marcos Alonso Peña, played for Barcelona and Atlético Madrid and represented Spain at the 1982 World Cup, while his grandfather, Marcos Alonso Imaz, also played professionally for Real Madrid. Marcos joined Real Madrid's youth academy, following the family tradition, before making his first-team debut in 2010. Alonso moved to England with Bolton Wanderers later that year, beginning a well-travelled career that took him to Italy's Fiorentina, with a loan back to England at Sunderland, before Chelsea signed him for an estimated £24 million in 2016. His attacking left-back play, including a knack for scoring from set pieces and long-range efforts, made him a key contributor to Chelsea's 2016-17 Premier League title and the 2021 Champions League triumph. Alonso returned to Spain with Barcelona in 2022, winning the La Liga title in his first season, before moving to Celta Vigo in 2024. He earned caps for Spain from 2018, representing his country at Euro 2020 and the 2022 World Cup. Alonso's career, spanning Real Madrid, Bolton, Fiorentina, Sunderland, Chelsea, Barcelona, and Celta, reflects both his versatility across multiple leagues and a family footballing legacy spanning three generations, from his grandfather's era at Real Madrid to his own achievements at some of Europe's biggest clubs.
Scoring crucial goals as an attacking left-back for Chelsea
He is the grandson of Marcos Alonso Sr., who won five European Cups with Real Madrid in the 1950s, making them one of football's most distinguished families.
Did You Know?How They Played
Attacking left-back known for his pace, crossing ability and goal threat
Lasting Impact
Alonso helped redefine the modern wing-back role in the Premier League during Chelsea's title-winning campaigns under Antonio Conte.
Career Honours
- Premier League 2017
- FA Cup 2018
- Europa League 2019
- Champions League 2021
| Club | Period | Fee | Apps | Goals |
|---|---|---|---|---|
| Real Madrid B | 2008–2010 | — | 39 | 3 |
| Real Madrid | 2010–2010 | — | 1 | 0 |
| Bolton Wanderers | 2010–2013 | — | 35 | 5 |
| Fiorentina | 2013–2016 | — | 58 | 4 |
| Sunderland | 2014–2014 | loan | 16 | 0 |
| Chelsea | 2016–2022 | £24m | 154 | 25 |
| Barcelona | 2022–2024 | — | 29 | 1 |
| Celta | 2024–Present | — | 63 | 4 |
 Spain | — | — | 9 | 1 |
Spanish Athletes