Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 07/2025 - 12/2026 |  | Pohang Steelers |  South Korea | Midfield | 40 |
| 01/2022 - 07/2025 |  | FC Seoul | South Korea | Midfield | 6 |
| 07/2020 - 12/2021 | | FC Seoul | South Korea | Midfield | 8 |
| 02/2020 - 07/2020 |  | RCD Mallorca |  Spain | Midfield | 10 |
| 07/2018 - 01/2020 |  | Newcastle United |  England | Midfield | 4 |
| 07/2014 - 06/2018 |  | Swansea City |  Wales | Midfield | 4 |
| 08/2016 - 08/2016 |  | Swansea City U21 | Wales | Midfield | |
| 08/2013 - 06/2014 |  | Sunderland AFC | England | Midfield | 4 |
| 07/2013 - 08/2013 | | Swansea City | Wales | Midfield | 17 |
| 08/2012 - 06/2013 | | Swansea City | Wales | Midfield | 24 |
| 01/2010 - 08/2012 |  | Celtic FC |  Scotland | Midfield | 18 |
| 01/2007 - 12/2009 | | FC Seoul | South Korea | Midfield | 21 |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League Qual. | 1 | 1 | - | - | 90 | - | - | - | 1 | - | - | » All matches |
| Europa League | 5 | 5 | - | 1 | 450 | 1 | 1 | - | 1 | - | - | » All matches |
| Europa League Qual. | 5 | 2 | 3 | - | 73 | - | - | - | - | - | - | » All matches |
| Premier League | 187 | 145 | 42 | 35 | 13.415 | 15 | 1 | 9 | 21 | - | - | » All matches |
| FA Cup | 11 | 6 | 5 | 2 | 659 | - | - | 1 | - | - | - | » All matches |
| League Cup | 19 | 16 | 3 | 3 | 1.524 | 1 | - | 1 | 5 | - | - | » All matches |
| Premiership | 65 | 44 | 21 | 11 | 4.255 | 9 | - | - | 7 | - | - | » All matches |
| FA Cup | 2 | 2 | - | - | 180 | 1 | - | - | 1 | - | - | » All matches |
| Primera División | 1 | - | 1 | - | 9 | - | - | - | - | - | - | » All matches |
 | AFC Champions League Elite | 10 | 9 | 1 | 1 | 824 | 1 | - | - | 2 | - | - | » All matches |
| AFC Champions League Two | 4 | 3 | 1 | 2 | 225 | - | - | - | - | - | - | » All matches |
| K League 1 | 183 | 145 | 38 | 57 | 13.134 | 7 | - | 14 | 20 | - | - | » All matches |
| Cup | 2 | 2 | - | 1 | 157 | 1 | - | 1 | 1 | - | - | » All matches |
| Total | 495 | 380 | 115 | 113 | 34.995 | 36 | 2 | - | 59 | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U21 Premier League 2 Div. 2 | 1 | 1 | - | 1 | 80 | - | - | - | - | - | - | » All matches |
| Total | 1 | 1 | - | 1 | 80 | - | - | - | - | - | - |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | World Cup | 9 | 9 | - | 4 | 743 | - | - | 2 | 1 | - | - | » All matches |
| WC Qualifiers Asia | 31 | 30 | 1 | 4 | 2.600 | 6 | 1 | 2 | 5 | - | - | » All matches |
| Friendlies | 59 | 54 | 5 | 32 | 4.294 | 3 | 1 | - | 9 | - | - | » All matches |
| Olympic Games | 9 | 9 | - | 2 | 816 | - | - | - | 4 | - | - | » All matches |
| Asian Cup | 13 | 13 | - | 4 | 1.205 | 1 | 1 | 2 | 4 | - | - | » All matches |
| Total | 121 | 115 | 6 | 46 | 9.658 | 10 | 3 | 6 | 23 | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U20 World Cup | 3 | 3 | - | - | 270 | - | - | - | - | - | - | » All matches |
| Total | 3 | 3 | - | - | 270 | - | - | - | - | - | - |
Personal achievements
| Player of the Year | ||
|---|---|---|
| South Korea | 2012 | 2011 | 2016 |