Chelsea are set to go head-to-head with Arsenal for the signing of Newcastle United midfielder Moussa Sissoko - and, according to reports, are prepared to sell either Willian or Oscar in the January transfer window in order to free up a space for the France international.
This surprising news comes courtesy of respected Portuguese newspaper Record, who cite reports as claiming that Jose Mourinho is so determined to bring Sissoko to Stamford Bridge that he is willing to sell one of his revered attacking midfielders.
Sissoko, 25, has impressed in recent weeks - despite his red card in last month's 1-0 defeat against West Ham United - and has recently been linked with a move to Arsenal, who reportedly want the midfielder to fill the void left by the injured Jack Wilshere.
That Chelsea might want to sign Sissoko is not surprising in itself, but the club's supporters have every reason to be a little sceptical about these latest reports suggesting Mourinho is prepared to sell one of his best attacking players.
Both Willian and Oscar have played important roles in Chelsea's excellent early-season form - having made 14 and 13 Premier League appearances, respectively - and there have been no indications that Mourinho is unhappy with either player.
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The report adds that Sissoko, who is contracted to the Magpies until June 2019, is valued at around €10 million. Considering Willian and Oscar are worth at least three times that figure, it makes little sense why Mourinho would feel the need to sell one of them.
Sissoko impressed on Saturday
However, Mourinho may have been impressed with Sissoko's performance during Saturday's surprise 2-1 victory over Chelsea.
The Frenchman lined up in an attacking midfield three, behind lone striker Ayoze Pérez, and was one of the hosts' standout performers.
Chelsea lost this same fixture last season, which prompted Mourinho to make some sweeping changes, including dropping first-choice left-back Ashley Cole with Cesar Azpilicueta.
But it seems unlikely that Mourinho will make any drastic changes this time around. Chelsea are currently three points clear at the top of the Premier League table and are still the firm favourites to win their first league title since 2010 at the end of the season.