The central midfielder has signed a four-year deal at the King Power Stadium having faced the Foxes in the Champions League last season.
Leicester City have completed the signing of Sevilla midfielder Vicente Iborra for a reported fee of £10.5 million.
The 29-year-old has signed a four-year deal at the King Power Stadium after he impressed Foxes manager Craig Shakespeare when the sides met in the Champions League last season.
Iborra captained Sevilla to a fourth-placed finish in La Liga last season, scoring seven goals in 31 league appearances under Jorge Sampaoli.