After just 21 games for St Etienne Saidy Janko has joined FC Porto in what is reported to be a £3m transfer deal.
The Swiss youth internationalist joined Celtic in the summer of 2015 but struggled to make an impact before injury brought his first season to a halt.
Bem-vindo Saidy ?????
Welcome Saidy ?????
Bienvenido Saidy ?????#FCPorto #nascidosparavencer #BemVindoSaidy pic.twitter.com/9aoEAsX9Lm— FC Porto (@FCPorto) June 27, 2018
Brendan Rodgers seemed keen to give Janko a chance to impress but two days after a disastrous performance away to Hapoel Beer Sheva he was sent on loan to Barnsley.
Last summer he made a low key move to St Etienne with Celtic likely to have protected themselves by putting a sell-on clause in his contract.
Janko will effectively replace Diogo Dalot who has moved from Porto to Manchester United in a £19m deal.
Porto won the league by seven points from Benfica last season and automatically go into the group phase of the Champions League.