Porto pair Hector Herrera and Alex Telles are both being linked with a move to Atletico Madrid.
A Bola reports Atletico Madrid are about to sign the pair for a combined fee of €30m.
Telles is likely to replace Filipe Luis, whilst also adding defensive numbers following the departures of Lucas Hernandez and Diego Godin.
Both players have been integral parts of Porto's run to the Champions League quarter-final, but their time in Portugal looks set to end.
Herrera has long been championed for a move abroad, including by none other than former Juventus director, Luciano Moggi, however the summer of 2019 will see his contract with the Portuguese champions expire.