The French Ligue 1 giants Paris Saint-Germain (PSG) have completed the signing of a new Argentine midfielder, with the player agreeing to terms on a five-year contract worth 50 million euros.

The player's name has not been revealed yet, but it is expected that he will be making his debut for PSG during the upcoming season. The club's sporting director, Leonardo, said that the move was a "blockbuster" and that the signing was part of PSG's ongoing efforts to strengthen their squad ahead of next season.

PSG have already made some significant signings this winter transfer window, including the loan signing of Manchester United winger Juan Mata and the permanent signing of Monaco goalkeeper Alphonse Areola. The club's new manager, Mauricio Pochettino, has spoken highly of the players he has brought in, saying that they have all shown promise and potential.

The signing of the new midfielder is likely to boost PSG's midfield depth and provide competition for places in the starting lineup. With the club looking to compete for domestic and European honours next season, the addition of such a high-quality player is a major coup for PSG.

Overall, the signing of the new midfielder is a major statement from PSG, and one that could prove to be a game-changer for the team in the coming seasons.