| Athletics |
2011 European Junior Championships
|
Tallinn |
 EST |
4 x 400 m Relay, Women |
🥈 |
 POL |
|
| Athletics |
2013 European Athletics U23 Championships
|
Tampere |
 FIN |
4 x 400 m Relay, Women |
🥇 |
POL |
|
| Athletics |
2013 European Athletics U23 Championships
|
Tampere |
FIN |
400 m, Women |
🥉 |
POL |
|
| Athletics |
2015 European Athletics Indoor Championships
|
Praha |
 TCH |
4 x 400 m Relay, Women |
🥉 |
POL |
|
| Athletics |
2015 Summer Universiade
|
Gwangju |
 KOR |
4 x 400 m Relay, Women |
🥇 |
POL |
|
| Athletics |
2016 World Athletics Indoor Championships
|
Portland |
 USA |
4 x 400 m Relay, Women |
🥈 |
POL |
|
| Athletics |
2017 European Athletics Indoor Championships
|
Beograd |
 SRB |
400 m, Women |
🥉 |
POL |
|
| Athletics |
2017 European Athletics Indoor Championships
|
Beograd |
SRB |
4 x 400 m Relay, Women |
🥇 |
POL |
|
| Athletics |
2017 World Athletics Relays
|
Nassau |
 BAH |
4 x 400 m Relay, Women |
🥈 |
POL |
|
| Athletics |
2017 World Athletics Championships
|
London |
 GBR |
4 x 400 m Relay, Women |
🥉 |
POL |
as Justyna Święty |
| Athletics |
2017 Summer Universiade
|
Taipei |
 TPE |
4 x 400 m Relay, Women |
🥇 |
POL |
|
| Athletics |
2018 World Athletics Indoor Championships
|
Birmingham |
GBR |
4 x 400 m Relay, Women |
🥈 |
POL |
|
| Athletics |
2018 European Athletics Championships
|
Berlin |
 GER |
4 x 400 m Relay, Women |
🥇 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2018 European Athletics Championships
|
Berlin |
GER |
400 m, Women |
🥇 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2019 European Athletics Indoor Championships
|
Glasgow |
GBR |
4 x 400 m Relay, Women |
🥇 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2019 World Athletics Relays
|
Yokohama |
 JPN |
4 x 400 m Relay, Women |
🥇 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2019 World Athletics Championships
|
Doha |
 QAT |
4 x 400 m Relay, Women |
🥈 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2019 Military World Games
|
Wuhan |
 CHN |
4 x 400 m Relay, Women |
🥇 |
POL |
as Justyna Święty-Ersetic |
| Athletics |
2019 Military World Games
|
Wuhan |
CHN |
400 m, Women |
🥉 |
POL |
|
| Athletics |
2021 European Athletics Indoor Championships
|
Toruń |
POL |
400 m, Women |
🥈 |
POL |
|
| Athletics |
2022 World Athletics Indoor Championships
|
Beograd |
SRB |
4 x 400 m Relay, Women |
🥉 |
POL |
|
| Athletics |
2022 European Athletics Championships
|
München |
GER |
4 x 400 m Relay, Women |
🥈 |
POL |
|
| Athletics |
2024 World Athletics Relays
|
Nassau |
BAH |
4 x 400 m Relay, Women |
🥈 |
POL |
|
| Athletics |
2025 World Athletics Indoor Championships
|
Nanjing |
CHN |
4 x 400 m Relay, Women |
🥈 |
POL |
|