Marcos Alonso
Marcos Alonso, 35, from Spain ➤ Celta de Vigo, since 2024 ➤ Centre-Back ➤ Market value: €1.20m ➤ * 28/12/1990 in Madrid, Spain

Info
Biographical card, current club and contract facts. Empty fields mean the source did not publish that value.
- Club
- Celta de Vigo
- League
- LaLiga
- Position
- Defender - Centre-Back
- Shirt
- #3
- Age
- 35
- Date of birth
- 28/12/1990
- Height
- 1,88m
- Foot
- left
- Citizenship
- Spain
- Joined
- 28/08/2024
- Contract until
- 30/06/2028
- Market value
- €1.20m
- Career fees
- €25.40m
- Youth clubs
- Real Madrid (1999-2008)
Statistics
Career totals from Transfermarkt: this season, then by competition and by club. Minutes and cards appear when the source recorded them.
This season
| Season | Competition | Apps | Min | G | A | YC | RC |
|---|---|---|---|---|---|---|---|
| 26/27 | LaLiga | 3 | 231 | 0 | 0 | 1 | 1 |
By competition
| Competition | Apps | G | A |
|---|---|---|---|
| Premier League | 179 | 26 | 18 |
| LaLiga | 96 | 5 | 0 |
| Serie A | 58 | 4 | 7 |
| Europa League | 39 | 4 | 1 |
| 2ª B - Grupo II | 39 | 3 | 0 |
| UEFA Champions League | 30 | 1 | 1 |
| Championship | 26 | 4 | 2 |
| FA Cup | 25 | 2 | 1 |
| EFL Cup | 18 | 0 | 1 |
| Reserve League | 8 | 0 | 0 |
| Copa del Rey | 7 | 1 | 0 |
| Italy Cup | 4 | 0 | 0 |
| Community Shield | 2 | 0 | 0 |
| Premier League 2 | 2 | 0 | 0 |
| UEFA Super Cup | 1 | 0 | 0 |
| Europa League Qualifying | 1 | 0 | 0 |
| Club World Cup | 1 | 0 | 0 |
| Supercopa | 1 | 0 | 0 |
By club
| Club | Apps | G | A |
|---|---|---|---|
| Chelsea | 212 | 29 | 21 |
| Fiorentina | 85 | 5 | 7 |
| Celta de Vigo | 79 | 5 | 0 |
| Bolton | 46 | 5 | 2 |
| Barcelona | 45 | 3 | 0 |
| RM Castilla | 39 | 3 | 0 |
| Sunderland | 20 | 0 | 1 |
| Bolton U21 | 10 | 0 | 0 |
| Real Madrid | 1 | 0 | 0 |
Transfers
Recorded moves between clubs, with fee and market value on the day of the deal when the source has them.
| Date | Season | From | To | Fee | Market value |
|---|---|---|---|---|---|
| 28/08/2024 | 24/25 | Barcelona | Celta de Vigo | free transfer | €2.00m |
| 01/09/2022 | 22/23 | Chelsea | Barcelona | free transfer | €12.00m |
| 31/08/2016 | 16/17 | Fiorentina | Chelsea | €23.00m | €9.00m |
| 30/06/2014 | 13/14 | Sunderland | Fiorentina | End of loan | €2.00m |
| 01/01/2014 | 13/14 | Fiorentina | Sunderland | loan transfer | €2.00m |
| 01/07/2013 | 13/14 | Bolton | Fiorentina | free transfer | €1.50m |
| 01/07/2010 | 10/11 | RM Castilla | Bolton | €2.40m | - |
| 01/07/2008 | 08/09 | Real Madrid U19 | RM Castilla | - | - |
| 01/07/2007 | 07/08 | Real Madrid U18 | Real Madrid U19 | - | - |
| 01/07/2006 | 06/07 | Real Madrid U17 | Real Madrid U18 | - | - |
| 01/07/2005 | 05/06 | R.Madrid Yth. | Real Madrid U17 | - | - |
National
Senior and youth national-team spells: caps, goals, shirt number and whether the player is still in the current pool.
| Team | Caps | Goals | Shirt | Debut | Status |
|---|---|---|---|---|---|
| Spain | 9 | 0 | 17 | 2018-03-27 | Former international |
| Spain U19 | 4 | 0 | 0 | — | Former international |
Market value
Current and peak Transfermarkt valuations, plus the history of changes by club and age. Rankings are relative to the current squad, league and position group.
- Current
- €1.20m
- Highest
- €45.00m · 17/10/2018
- Last change
- 05/06/2026
| Date | Age | Club | Value |
|---|---|---|---|
| 28/07/2010 | 19 | Bolton Wanderers | €1.50m |
| 01/02/2011 | 20 | Bolton Wanderers | €2.00m |
| 08/08/2011 | 20 | Bolton Wanderers | €2.00m |
| 06/02/2012 | 21 | Bolton Wanderers | €1.50m |
| 24/06/2012 | 21 | Bolton Wanderers | €1.50m |
| 02/03/2013 | 22 | Bolton Wanderers | €1.50m |
| 11/07/2013 | 22 | ACF Fiorentina | €2.00m |
| 15/01/2014 | 23 | Sunderland AFC | €2.00m |
| 08/11/2014 | 23 | ACF Fiorentina | €3.00m |
| 07/01/2015 | 24 | ACF Fiorentina | €3.00m |
| 01/07/2015 | 24 | ACF Fiorentina | €2.80m |
| 05/11/2015 | 24 | ACF Fiorentina | €5.50m |
| 04/01/2016 | 25 | ACF Fiorentina | €8.00m |
| 15/07/2016 | 25 | ACF Fiorentina | €9.00m |
| 24/10/2016 | 25 | Chelsea FC | €13.00m |
| 20/02/2017 | 26 | Chelsea FC | €20.00m |
| 28/06/2017 | 26 | Chelsea FC | €25.00m |
| 02/01/2018 | 27 | Chelsea FC | €30.00m |
| 23/03/2018 | 27 | Chelsea FC | €35.00m |
| 28/05/2018 | 27 | Chelsea FC | €40.00m |
| 17/10/2018 | 27 | Chelsea FC | €45.00m |
| 19/12/2018 | 27 | Chelsea FC | €45.00m |
| 13/06/2019 | 28 | Chelsea FC | €40.00m |
| 12/09/2019 | 28 | Chelsea FC | €32.00m |
| 10/12/2019 | 28 | Chelsea FC | €25.00m |
| 08/04/2020 | 29 | Chelsea FC | €20.00m |
| 30/07/2020 | 29 | Chelsea FC | €18.00m |
| 13/10/2020 | 29 | Chelsea FC | €18.00m |
| 17/12/2020 | 29 | Chelsea FC | €13.00m |
| 18/03/2021 | 30 | Chelsea FC | €13.00m |
| 08/06/2021 | 30 | Chelsea FC | €12.00m |
| 05/10/2021 | 30 | Chelsea FC | €15.00m |
| 23/12/2021 | 30 | Chelsea FC | €15.00m |
| 15/06/2022 | 31 | Chelsea FC | €12.00m |
| 07/11/2022 | 31 | FC Barcelona | €9.00m |
| 23/03/2023 | 32 | FC Barcelona | €7.00m |
| 13/06/2023 | 32 | FC Barcelona | €5.00m |
| 13/10/2023 | 32 | FC Barcelona | €3.00m |
| 22/12/2023 | 32 | FC Barcelona | €3.00m |
| 07/06/2024 | 33 | FC Barcelona | €2.00m |
| 27/12/2024 | 33 | Celta de Vigo | €1.80m |
| 09/06/2025 | 34 | Celta de Vigo | €1.50m |
| 12/12/2025 | 34 | Celta de Vigo | €1.40m |
| 05/06/2026 | 35 | Celta de Vigo | €1.20m |
xG Statistics
Marcos Alonso's xG Statistics block is an Understat shot model for the 2026 season. It does not replace goals and assists — it explains them. xG and xA ask whether the chances were good enough; xGChain and xGBuildup show how often the player was on the ball in moves that became shots. Use minutes as the denominator: a large xG in 80 minutes is a hot streak, the same xG over 1,200 minutes is a role. Figures are rounded to two decimals and stay empty when Understat has no match for this player.
| Season | League | Club | Apps | Min | G | xG | npxG | A | xA | Sh | KP | xGChain |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | La liga | Celta Vigo | 4 | 323 | 0 | 0.2 | 0.2 | 0 | 0 | 2 | 0 | 0.82 |
| 2025 | La liga | Celta Vigo | 32 | 2780 | 1 | 2.3 | 1.56 | 0 | 1.57 | 24 | 14 | 14.41 |
What the columns mean
Read this table as chance quality, not as a scoreboard. A player can outscore xG (finishing well) or lag behind it (missed sitters). Compare rows only when minutes are in the same range.
Apps· Appearances- Matches in which the player was used in this league season, including substitute minutes.
Min· Minutes- Total minutes on the pitch. Useful when comparing output: 1 goal in 90 minutes is not the same as 1 goal in 800.
G· Goals- Goals credited to the player in the Understat shot model for that season.
xG· Expected goals- The quality of shots the player took, expressed as the number of goals an average finisher would score from the same chances. A 0.30 xG shot is a chance that goes in about 3 times in 10.
npxG· Non-penalty xG- Expected goals with penalties removed. This is the cleaner read of open-play and set-piece finishing, because a penalty is usually ~0.76 xG by itself.
A· Assists- Goals that followed the player's last pass. Actual assists, not the model.
xA· Expected assists- The xG value of shots that came directly from the player's key passes. High xA with few assists usually means teammates missed good chances.
Sh· Shots- Total shots recorded by Understat, including blocked and off-target attempts.
KP· Key passes- Passes that led to a shot. This is the volume behind xA.
xGChain· xG chain- Team xG from possessions the player touched. It captures involvement in build-up, not only the shot or the last pass. A midfielder who starts attacks can rank high here without scoring.
xGBuildup· xG buildup- The same possession xG, but excluding the shot-taker and the assist. This is the purest 'how much did this player help create the chance before the final ball' number.
NPG· Non-penalty goals- Goals scored from open play or set pieces, excluding penalties.







