Porto have activated the release fee for on-loan Real Madrid midfielder Casemiro.
The midfielder joined the Primeira Liga side on a one-year loan in July and has impressed at Estadio do Dragao.
Brazil international Casemiro scored three goals in 28 league appearances for Porto and looks set to stay in Portugal.
La Liga giants Real can opt to reject the move but would have to compensate Porto.
'People will remember us because we got to No.1 in the world rankings and achieved great things - but our biggest regret is that we didn’t win anything': Ex-Everton star Kevin Mirallas opens up on 'honour' of being part of nation's golden generation
‘I’m sure we’d have finished in the top four or five if he hadn’t joined Chelsea in January. Him leaving damaged the team, but we couldn’t stand in his way’: Alan Curbishley reflects on failed Champions League dream after selling key player
