Chelsea FC's transfer window can be classified as one of the best of the last decade in terms of numbers.

Despite having invested approximately €328 million, it ended with a surplus of €4 million due to the enormous amount of sales it made.

After many transfer periods that ended with extravagant investments but no results, the Blues are coming off winning the Club World Cup and are aiming squarely for this season's Champions League.

Part of building a great team is knowing how to maintain the core that is assembled, and for Enzo Maresca, that seems to be important.

The tweaks with the recent signings gave his team quality and quick results, although one of those who recently arrived may already have an exodus that hurts Chelsea.

Chelsea's latest inclusion picks up injury during international break The international break remains to be a matter of concern for all the clubs around the world as another <a href="https://chelseaworld.io/">Chelsea</a> player picked up a muscle injury during his national team duties.

Andrey Santos spent last season on loan at RC Strasbourg, where he had a superlative performance and earned a place in Maresca's consideration for this season.

With only 7 matches wearing the Blues shirt, Al Qadisiya went looking for him to replace the departure of Equi Fernández to Bayer Leverkusen.

According to The Mirror, the Arab team is willing to invest €68 million for the Brazilian midfielder and has already sent an offer to Chelsea FC for them to decide.

It will be difficult for him to leave because Maresca rates him very highly, and he explained it in an interview with Fabrizio Romano in August.

"I am very happy with Andrey and very happy that Andrey is staying here with us. For sure, he can play in Enzo Fernández's position, for sure, he can play in Moi Caicedo's position," explained the Italian coach, who gave Santos minutes during the first matchdays of the current Premier League.

Andrey Santos's good moment in Europe earned him a place among the call-ups for the Brazilian national team. Carlo Ancelotti called him up for the last double date of South American Qualifiers, and the Chelsea footballer came on to play almost half an hour at the Maracanã.

However, Chelsea could choose to part ways with the Brazilian player. The Arab team received around €30 million from the sale of Equi Fernández to Bayer Leverkusen, although it has already made a major investment in the purchase of Mateo Retegui, a forward from Atalanta and the top scorer of the last Serie A. We will see what happens.