With less than a day until the January transfer window, clubs in the Premier League and in Europe are jockeying in preparation of a busy month of negotiations.

Manchester United are reportedly ready to listen to offers for Raphael Varane in January and could permanently offload Mason Greenwood as they look to raise funds for new signings.

Elsewhere, Ange Postecoglou has made a Serie A star one of his priority signings as he looks to bolster his defensive options, which have been decimated by injuries this season.

Spurs are also keeping an eye on one of the most in-form strikers in the Premier League, while Kalvin Phillips' move to Juventus may not be as straightforward as expected.

Below, Mail Sport takes a look at the transfer rumours on Sunday morning.

Atletico Madrid have approached Manchester United over the signing of Mason Greenwood. The former England international has scored five goals in 15 appearances in all competitions on loan at Getafe. (Marca - in Spanish)

Greenwood is unlikely to join Barcelona, with the reigning LaLiga champions put off by Manchester United's £40million valuation of the striker. (Sport - in Spanish) 

Manchester United have triggered a clause to extend Victor Lindelof's contract by a further 12 months until the end of June 2025. The 29-year-old's deal was due to expire at the end of the season. The Sweden international has made just 12 Premier League appearances this season and has been sidelined with a groin injury this month. (The Athletic) 

United are prepared to listen to offers for Raphael Varane in January. The 30-year-old returned to the starting XI against Liverpool earlier two weeks ago after being frozen out for almost two months. (Football Insider)

Tottenham have made Genoa defender Radu Dragusin their main target as Ange Postecoglou looks to bolster his defensive options. The Romania international has already reached a verbal agreement with Spurs, who must now open talks with the Serie A club. (Fabrizio Romano)

Dragusin's agent has revealed the 21-year-old is keen to move to the Premier League, but insisted 'several teams' were interested in the defender, who has started all of Genoa's 18 Serie A games this season. (SportItalia - in Italian)

Spurs remain keen on Dominic Solanke, who has scored 13 goals in 19 matches in all competitions this season. (The Independent) 

Juventus and Manchester City remain in talks for Kalvin Phillips over a loan deal. The England international has made just 10 appearances in all competitions this season and looks finally set to leave the Etihad just 18 months after his move from Leeds. (The Times)

But Juventus boss Massimiliano Allegri could veto the move as he doesn't believe Phillips fits his tactical system. (Calciomercato - in Italian) 

Gelson Martins is close to joining his compatriot Nuno Espirito Santo at Nottingham Forest in January. The Portugal winger last played for Monaco in March and his contract expires at the end of the season. (Mirror)

Forest are also hoping to complete the £6m signing of Fluminense defender Nino early in the January transfer window (Mirror)

Borussia Dortmund are keeping tabs on Chelsea defender Ian Maatsen ahead of a possible January move. The 21-year-old rejected a permanent switch to Burnley in the summer, after helping the Clarets win promotion last season. (Voetbal international - in Dutch)