The need for liquidity, compounded by the loss of €9.6 million after failing to make the final eight in the Champions League, as well as the threat from UEFA of exclusion for three seasons from European competitions, incited FC Porto to sell three players.

The best player in the I Liga in October and November 2021, Colombian striker Luis Díaz, joined Liverpool for €45 million.

Mexican striker Jesús Corona, voted the best individual in the championship two seasons ago, joined Sevilla on a permanent basis for €3 million.

As for the Portuguese international midfielder Sérgio Oliveira, he signed for José Mourinho's Roma, with a transfer fee of €1 million and a purchase option of €13 million.

The sales allowed FC Porto to be the third club in the world with the highest revenue generated in January (€49 million), behind Italians Fiorentina (€81.6 million) and Manchester City (€55 million).

Supported by the continuity in the Champions League, national champions Sporting retained key players such as Pedro Gonçalves, João Palhinha, Matheus Nunes or Gonçalo Inácio.

Tiago Tomás went on loan to Stuttgart, with a purchase option of €15 million, and the Cape Verdean Jovane Cabral was snapped up by Lazio shortly before the end of the window, with a loan fee of €1 million and an €8 million clause.

Benfica, who are also still in the Champions League, had a goal of significantly reducing the squad led by Nélson Veríssimo but were unsuccessful on the whole, only agreeing to loan defender Ferro to Croatia's Hajduk Split.

Benfica will continue with a squad of 30 players and an enormous salary bill.

According to reports in the press, Benfica allegedly refused a proposal of €40 million, plus €5 million in variables, from West Ham for Darwin Núñez, the championship's top scorer, on the last day of the window.

Sporting de Braga saw the temporary departure of Mario González (Tenerife) and Raul Silva (Estoril Praia), Luan Gonçalves (Leixões) and Eduardo (Náutico).

At a global level, the Portuguese I Liga is the fourth with the most revenue generated in January, with almost €80 million, behind England (€133.52 million), Italy (€127.4 million) and France (€99.15 million).

The market will remain active for a few weeks in countries such as Turkey, Romania, Hungary, Switzerland, Russia, Argentina, Poland, Ukraine and Brazil.