Guilherme Arana has been mentioned as a target for Olympiacos. It is reported that he has an orientation to stay in Brazil, where Fluminense wants him. His market value is around 7 million euros and his contract runs until December 2027.

Olympiacos is monitoring Atletico Mineiro's Guilherme Arana, a 28-year-old Brazilian, as a potential option for the left-back position. Arana has past European experience, having played in Spain and for Atalanta. He is under contract with his club until 2027 and his market value is considered high for Greek standards. According to Brazilian sources, Atletico Mineiro is not opposed to a transfer under the right conditions. Olympiacos has reportedly made exploratory contacts and gathered information about the market, but is operating discreetly and has not yet submitted an official offer. Arana is mentioned as one of two Brazilian players being watched, alongside Kaua Prates of Cruzeiro. The left-back has 13 caps for Brazil, his current Transfermarkt market value is €7.00m, and Fluminense has also been linked with him.