With all eyes fixed on the January transfer market, clubs around the UK and Europe are already lining up potential mid-season moves.

Tuesday morning's headlines:

Barcelona 'prepared to sell Ousmane Dembele'
Chelsea, Arsenal and Liverpool are on high alert with the news that Barcelona are reportedly prepared to sell Ousmane Dembele. Read more.

Cristiano Ronaldo explains Real Madrid exit
Cristiano Ronaldo says that he left Real Madrid during the summer as he no longer felt valued at the club. Read more.

Besiktas 'want to send Loris Karius back'
Besiktas want to send Liverpool goalkeeper Loris Karius back to Anfield in exchange for Divock Origi, according to a report. Read more.

Tottenham Hotspur 'eye Andre Onana swoop'
Tottenham Hotspur consider a January move for Ajax goalkeeper Andre Onana, according to a report. Read more.

Manchester United 'have £100m January budget'
Manchester United boss Jose Mourinho will have £100m to spend in the January transfer window, according to a report. Read more.

Cardiff City, West Ham United keen on French winger Allan Saint-Maximin?
Cardiff City and West Ham United are reportedly considering an offer for Nice winger Allan Saint-Maximin during the January transfer window. Read more.

Inter Milan to rival Chelsea for Brescia midfielder Sandro Tonali?
Inter Milan are reportedly ready to rival Chelsea in the race to sign Bresica youngster Sandro Tonali. Read more.

Manchester United 'quoted £133m for Barcelona's Jordi Alba'
Barcelona will reportedly demand that any clubs interested in signing Jordi Alba meet the left-back's £133m release clause. Read more.

Liverpool, Arsenal to miss out on Napoli midfielder Piotr Zielinski?
Liverpool and Arsenal are reportedly handed a transfer blow with the news that Napoli are ready to hand a new contract to midfielder Pitor Zielinski. Read more.

Real Madrid midfielder Mateo Kovacic: 'Too early to talk of Chelsea stay'
Mateo Kovacic says that it is "too early" to speak of a permanent switch from Real Madrid to Chelsea, despite admitting that he is enjoying life in West London. Read more.

Pavel Nedved: 'Juventus return for Paul Pogba would be wonderful'
Juventus vice-president Pavel Nedved says that it would be "wonderful" if Manchester United midfielder Paul Pogba returned to Turin in the future. Read more.