Atletico Madrid have agreed a deal to sign the Dinamo Moscow duo of Giourkas Seitaridis and Costinha.
The pair both spent just one season in Russia, but they will now move to the Vicente Calderon as part of Atletico's summer rebuilding plans after a disappointing campaign.
Greek full back Seitaridis was part of his country's shock Euro 2004 victory and the 24-year-old has agreed to a four-year contract with the Spanish side.
32-year-old Costinha won the Uefa Cup and UEFA Champions League with Jose Mourinho's Porto side, and he has now agreed a two-year deal with Atletico.
Costinha recently discarded his contract with Dinamo after saying they had failed to pay his salary recently, while he also fell out with coach Yuri Syomin.
"Atletico Madrid have reached agreement today (Tuesday) with Dinamo Moscow to sign Georgios Seitaridis and Francisco Jose da Costa (Costinha)," said the club's official website.
Atletico also say that they have agreed deals for Argentine striker Sergio Aguero, Getafe left back Mariano Pernia and Portuguese centre back Ze Castro, while manager Javier Aguirre will be the new coach, as they look for a vast improvement on last year when they finished 10th.