Valladolid officially announced that the team had signed Porto defender Janko.
After agreeing to join, Janko and Valladolid signed a contract that expires on June 30, 2024.
Yanke will celebrate his 25th birthday this month. Born in Zurich, he comes from the FC Zurich Youth Training.
Yanko has also played for Manchester United, Bolton, Celtics, Barnsley and Saint Etienne. He joined Porto from Saint Etienne in the summer of 2018.
Janko hasn't played for Porto yet, he has been loaned to Nottingham Forest and young people in Bern.
After joining the young Berne on loan last summer, Janko played 46 times, scoring 1 goal and assisting 6 times.