PLAYER PROFILE / Defensive Midfield
Sung-yueng Ki.
Pohang Steelers · Korea, South
TM 81796 · Current player profileAge today37
Recorded moves10
Peak recorded value€10.00m
Current market value€375k
01 / PLAYER DETAILS
At a glance
- Full name
- 기성용
- Born
- 24 Jan 1989
- Nationality
- Korea, South
- Position
- Defensive Midfield
- Preferred foot
- right
- Height
- 188
- Joined current club
- 03 Jul 2025
- Contract expires
- —
02 / THE JOURNEY
Previous clubs
- FC SeoulLast recorded move · 03 Jul 2025
- RCD MallorcaLast recorded move · 20 Jul 2020
- Newcastle UnitedLast recorded move · 31 Jan 2020
- Swansea CityLast recorded move · 01 Jul 2018
- Sunderland AFCLast recorded move · 31 May 2014
- Celtic FCLast recorded move · 24 Aug 2012
- Kumho High School (-2010)Last recorded move · 01 Jan 2006
- John Paul CollegeLast recorded move · 01 Sep 2004
Clubs from completed, dated transfers, most recent first. Repeat spells are listed in the full transfer history.
03 / VALUE OVER TIME
Market value history
| Valuation date | Age then | Club at the time | Market value |
|---|---|---|---|
| 21 May 2026 | 37 | Pohang Steelers | €375k |
| 16 Dec 2025 | 36 | Pohang Steelers | €400k |
| 03 Jun 2025 | 36 | FC Seoul | €450k |
| 05 Dec 2024 | 35 | FC Seoul | €500k |
| 14 Jun 2024 | 35 | FC Seoul | €550k |
| 19 Dec 2023 | 34 | FC Seoul | €600k |
| 23 Jun 2023 | 34 | FC Seoul | €700k |
| 27 Dec 2022 | 33 | FC Seoul | €750k |
| 18 Jun 2022 | 33 | FC Seoul | €800k |
| 26 Dec 2021 | 32 | FC Seoul | €900k |
| 22 Jun 2021 | 32 | FC Seoul | €1.00m |
| 21 Dec 2020 | 31 | FC Seoul | €1.20m |
| 27 Jul 2020 | 31 | FC Seoul | €2.40m |
| 08 Apr 2020 | 31 | RCD Mallorca | €2.40m |
| 05 Mar 2020 | 31 | RCD Mallorca | €3.00m |
| 10 Dec 2019 | 30 | Newcastle United | €4.50m |
| 13 Jun 2019 | 30 | Newcastle United | €6.00m |
| 19 Dec 2018 | 29 | Newcastle United | €6.00m |
| 28 May 2018 | 29 | Swansea City | €7.00m |
| 02 Jan 2018 | 28 | Swansea City | €7.00m |
| 28 Jun 2017 | 28 | Swansea City | €7.00m |
| 20 Feb 2017 | 28 | Swansea City | €7.50m |
| 01 Aug 2016 | 27 | Swansea City | €7.50m |
| 09 Feb 2016 | 27 | Swansea City | €8.00m |
| 01 Jul 2015 | 26 | Swansea City | €10.00m |
| 12 Feb 2015 | 26 | Swansea City | €8.00m |
| 12 Aug 2014 | 25 | Swansea City | €6.00m |
| 15 Jan 2014 | 24 | Sunderland AFC | €6.50m |
| 18 Sep 2013 | 24 | Sunderland AFC | €6.00m |
| 02 Jul 2013 | 24 | Swansea City | €8.00m |
Each row is a dated valuation. The bar shows its share of the player’s peak recorded value. — means not recorded.
04 / EVERY MOVE
Full transfer history
| Date | From | To | Move | Fee |
|---|---|---|---|---|
| 03 Jul 2025 | FC Seoul | Pohang Steelers | Transfer | — ? |
| 20 Jul 2020 | RCD Mallorca | FC Seoul | Transfer | Free |
| 31 Jan 2020 | Newcastle United | RCD Mallorca | Transfer | Free |
| 01 Jul 2018 | Swansea City | Newcastle United | Transfer | Free |
| 31 May 2014 | Sunderland AFC | Swansea City | Loan return | — End of loan |
| 31 Aug 2013 | Swansea City | Sunderland AFC | Loan | — loan transfer |
| 24 Aug 2012 | Celtic FC | Swansea City | Transfer | €7.00m |
| 01 Jan 2010 | FC Seoul | Celtic FC | Transfer | €2.40m |
| 01 Jan 2006 | Kumho High School (-2010) | FC Seoul | Transfer | Free |
| 01 Sep 2004 | John Paul College | Kumho High School (-2010) | Transfer | Free |
Includes loans, loan returns, internal moves and scheduled transfers. Free means a recorded €0 fee; — means no figure was recorded.