In addition to Mbappé, these are the stars who can freely negotiate with other clubs now

The new year brings with it some novelties. Starting this Monday, the transfer window opens in the main European leagues and clubs have the chance to sign players to add them to their squads to face the second half of the season. Now will come the most demanding stage of each tournament: the knock-out stages of the international tournaments and the decisive matches of the leagues.

But that will not be the only thing. Talks can also begin between clubs and players to agree on their arrival for next season. This is because FIFA rules allow players who have less than 6 months of contract in their current teams to negotiate with any other club in the world that has interest in adding them from the summer onwards. And not only. They can even sign contracts with them to secure them.

The most important case is that of Kylian Mbappé. The French striker will finish his contract with Paris Saint-Germain on June 30 and so from this Monday Real Madrid (as well as any other club) can call his agent and start talks to define his future. And like 'Kiki' there are other cases.

Adrien Rabiot, with a market value of $44 million, is finishing his contract with Juventus. However, the Italian side want him to stay and will try to convince him. Guido Rodriguez is in the same situation at Real Betis. And that could be interesting for Barcelona, who have been after him for a while. Two Manchester United players join that list: Aaron Wan-Bissaka and Anthony Martial. The latter will probably leave as a free agent.

What will happen with Toni?

Perhaps one of the most surprising cases is Toni Kroos. The 33-year-old German midfielder is one of the stars of Real Madrid, has been there for almost a decade and has won 4 Champions League titles. However, for now he has not agreed to renew his contract with the Spanish side.