Ekstraklasa
- 17O
- 17W
- 17S
90% or more have a feeSome have a feeNo fee recordedS summer, W winter, O other dates
2017-18 · Winter window
By club
- Legia Warsaw0 in1 out
- Piast Gliwice1 in0 out
- Wisła Płock1 in0 out
Sources: Wikipedia (CC BY-SA 4.0), API-Football · Data sources