Ander Herrera has returned to Athletic Bilbao after the club agreed a loan deal with Paris Saint-Germain.
Although the loan is initially for only the 2022-23 season, Athletic have the option to extend his stay for an extra year or make the arrangement permanent in 2023.
Herrera, 33, was born in Bilbao and spent three years at Athletic from 2011 after coming through Real Zaragoza's academy.
The experienced midfielder signed for PSG in 2019 after his Manchester United contract expired and made 95 appearances, winning Ligue 1, the Coupe de France and Trophee des Champions twice each, while also lifting the Coupe de la Ligue.
However, Herrera was never a regular starter for PSG and had been linked with a move away for much of the transfer window, with Christophe Galtier yet to call upon him this season.
Recent media reports suggested Herrera was likely to leave PSG on a free transfer, but the Parisians retain ownership of him for the time being.