Chelsea are reportedly readying a £51million bid for Real Madrid star Casemiro.
The Brazilian has established himself as one of the best midfielders in world football in the last few years.
Despite his fine form, it now appears that Madrid are ready to cash in after a relatively poor start to the La Liga season.
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El Nacional claim that stance has attracted the interest of Chelsea, who are looking to bolster their midfield options.
Thomas Tuchel has had to use a number of different combinations in the two central midfield spots for Chelsea, with injury problems for Mateo Kovacic, N’Golo Kante and Jorginho.
The report claims Chelsea are in the ‘driving seat’ to sign Casemiro, but will face competition from French giants Paris Saint-Germain for the 29-year-old.
Chelsea have struggled for control in recent games as Tuchel tries to cope with the Blues’ injury problems.
Atletico Madrid loanee Saul Niguez has played and struggled, and Reece James stepped into the role in the 3-3 draw with Zenit St Petersburg in the Champions League.
After the game, Tuchel urged his players to stop coasting when they hold the advantage in games, having given up the lead twice in Russia.
Tuchel said: “I won’t take it personally that you make a judgement here that my players are not listening to me, which I don’t find so nice but I leave it with you and your opinion,” said Tuchel.
“I think that we had a very good first 15 minutes and we stopped doing the things we did in the first 15 minutes.
“We were forgetting why we were the better team, because of the investment, the level of concentration, the level of physical investment was high enough to be the better team.
“Once this drops, five, 10 per cent, and it does; once we start managing results and changing our behaviour from what the score is, we get punished at the moment.
“It happened to us at West Ham and it happened again today.
“The reaction was good again, that shows me that it’s not about what we can do, because we can do it.
“Suddenly when we concede two goals we can step up, we can show a reaction. But once we have the lead we give it away again, like also today.
“The last six minutes again we started playing balls back, we started not attacking in the same aggression, the same hunger as before and we got immediately punished, now twice.”
He added: “My analysis is very clear: our behaviour changes when we have a lead and this is something we never did and we should never do.”