Sung-Yueng's current-season form is down 70% on last season (Season 10→3), while his Rating held around 6. His peak season for form remains 2021/22 (Season 34).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Pohang Steelers · 8th	25	0	0	6.1	5	3
2025/26	Pohang Steelers · 4th	16	0	2	7.1	6	10
2025/26	FC Seoul	8	0	0	7.1	—	—
2024/25	FC Seoul · 4th	20	2	1	7.05	13	15
2023/24	FC Seoul · 1st	35	2	2	7.12	18	23
2022/23	FC Seoul · 3rd	35	0	2	7.12	20	25

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 14 earlier seasons and 1 youth-team spell in the full career.

Korea Republic · international

Side	Apps	G
Korea Republic U23	9	0
Korea Republic U20	3	0
South Korea	108	10

Career caps & goals — tournament breakdown in the full career.

Scout report

Experienced headCentral midfielder

Ki Sung-Yueng is a 37-year-old central midfielder at Pohang Steelers, rated 5.5 overall by Field Insider's model, ranking 122nd of 123 on scout potential in the K League 1. A seasoned veteran, he has been a fringe squad member this season (25.1% of available minutes). His defensive output reads 1.1 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Sung-Yueng.

Judged on this season alone, Sung-Yueng graded 3 — a workmanlike campaign that ranks 30th of 32 of the 32 central midfielders in the K League 1, on 0 goals, 0 assists and 1.099 defensive actions per 90.

Year-on-year, that's a drop on last season (Season 10 → 3). Over the 7 seasons on record his form has held fairly steady, peaking in 2021/22.

On long-term talent our Rating reads 6, 32nd of 32 of the 32 central midfielders in the K League 1. At 37 Sung-Yueng is into the veteran stage, where the age curve weighs on the projection, and a market index of 0.3 reflects that trajectory.

From the career report

Read the full career report →

Past his 2021/22 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2021/22Trending downInjury-hit 2025/26

Current potential32nd of 32 central midfielders · K League 1 · 25 apps Current season30th of 32 central midfielders · K League 1 · 25 apps 30th-best central midfielder in the K League 1 122nd in the K League 1 · potential 32nd-highest potential central midfielder in the K League 1

5.5

Ratingi

32nd of 32 central midfielders

2.9

Seasoni

below regular-starter level

25.1%

Minutes

limited game time

1.1

Def. actions / 90

light defensive volume

Output in context · Pohang Steelers finished 8th of 12 · a mid-table side

Apps

1.1

Def. / 90

Tackles

Interceptions

Clean sheets

1.1 tackles, blocks & interceptions per 90 — light defensive volume, with 3 clean sheets across 25 appearances.

Watch points

Game time. Only 25.1% of available minutes — needs a settled run to prove the level.
Age curve. At 37, both level and resale value are on the downslope.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 5.5, Sung-Yueng carries the 32nd-highest potential of the central midfielders in the K League 1 of 32 — though on just 25 appearances this season, so the standing rests on a small sample. Defensively he reads as light defensive volume (1.1 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.5× and falling).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %25.1%

Available fixtures29 of 29

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 901.099

Player flow

Goal involvements0

Shot conversion %0

Shot accuracy %42.9

Pass accuracy %91

Dribble success %75

Cards / 900.137

Foul involvement / 900.962

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 22–27 (~1), then tapers with age. At 37, Sung-Yueng sits on 0.3, past its peak and easing. The blue line is Sung-Yueng's projected Rating — 5.5 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.

Season statistics

Bars = where he ranks among central midfielders in the K League 1 with 600+ minutes this season.

Shooting

Goals0

Shots on target3

Shots7

Passing

Assists0

Chances created11

Passes365

Pass accuracy91%

Possession

Successful dribbles3

Dribble success75%

Duels won14

Duels won %50%

Fouls won3

Defending

Tackles3

Interceptions5

Fouls committed4

Yellow/red cards

Yellow cards1

Red cards0

Transfer history

€9.4M total transfer fees · 8 moves

Pohang SteelersJul 2025 – now

FC SeoulJul 2020 – Jul 2025Free

MallorcaFeb 2020 – Jul 2020Free

NewcastleJul 2018 – Feb 2020Free

Swansea(back from loan)Jul 2014 – Jul 2018

Sunderland(on loan)Aug 2013 – Jul 2014

SwanseaAug 2012 – Aug 2013€ 7M

CelticJan 2010 – Aug 2012€ 2.4M

FC Seouluntil Jan 2010

About Ki Sung-Yueng

Sung-Yueng Ki is a 37-year-old central midfielder who plays for Pohang Steelers, born on January 24, 1989 in Gwangju, standing 189 cm tall. He is from Korea Republic. Pohang Steelers currently sit 8th of 12 in the K League 1.

This season

In the current season, Ki Sung-Yueng has made 25 appearances with 0 goals and 0 assists across 655 minutes, averaging a 6.01 match rating over his last 9 rated games, with 1 yellow card.

When Ki Sung-Yueng plays, Pohang Steelers's record this season is 3W-2D-6L — and his match ratings average 6.45 at home against 5.94 on the road.

Recent matches

September 12, 2026: 2-2 draw away at Daejeon Citizen (78 minutes, 0 rating)
September 5, 2026: 0-2 loss away at Jeonbuk Motors (72 minutes, 5.7 rating)
August 1, 2026: 0-1 loss at home vs Gimcheon Sangmu FC (72 minutes, 6.75 rating)
July 25, 2026: 0-2 loss at home vs Jeonbuk Motors (46 minutes, 5.6 rating)
July 11, 2026: 3-0 win away at Gwangju FC (80 minutes, 7.6 rating)
May 17, 2026: 0-2 loss away at Bucheon FC 1995 (45 minutes, 6.9 rating)
May 9, 2026: 2-0 win away at Daejeon Citizen (74 minutes, 6.9 rating)
April 26, 2026: 2-3 loss away at Jeonbuk Motors (67 minutes, 7.6 rating)
April 11, 2026: 0-2 loss at home vs Jeju United FC (45 minutes)
April 4, 2026: 1-0 win at home vs Daejeon Citizen (31 minutes, 7 rating)

Ki Sung-Yueng's next match is on September 20, 2026, when Pohang Steelers face FC Seoul at home in the K League 1.

Field Insider's view

Field Insider currently rates Ki Sung-Yueng at 5.5 with a Season form score of 2.9, ranking 122nd of 123 central midfielders in the K League 1. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 8 career titles — among them the Premier League Cup and the League Cup. Full list in the career record.

Career

Across 19 recorded seasons, Ki Sung-Yueng has totalled 459 club appearances with 33 goals and 14 assists for 8 different clubs. His busiest campaign came in 2021/22, with 35 appearances for FC Seoul.

Ki Sung-Yueng's career has also included time at FC Seoul, Mallorca, Newcastle, Swansea, Sunderland and Celtic.

On the international stage, Ki Sung-Yueng has represented Korea Republic U23, Korea Republic U20, South Korea — 120 caps and 10 goals in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Performance data · by competition

Career

Scout report

Output in context · Pohang Steelers finished 8th of 12 · a mid-table side

Watch points