Sevilla management are beaming after their double midfield swoop this week.
Rakitic, 22, arrived late last night for a medical while Medel's move was agreed last week and is close to being completed after he arrived in Spain this week.
Chilean World Cup star Medel, who plays as a defensive midfielder but also in defence, said: "I'm happy to be here, hopefully everything goes well.
"I am as player who gives everything I have on the pitch and play with my heart. I hope I can make a positive contribution to Sevilla.
"I want to win titles with the club."