Football transfer gossip: Mbappe, Bale, Costa, Simeone, Sanchez, Van Dijk, Lennon

Real Madrid boss Zinedine Zidane believes the club must sell winger Gareth Bale, 28, if they are to sign Monaco's 18-year-old forward Kylian Mbappe. (Marca)

Manchester United are tracking the situation at Real Madrid and are poised to make a £90m offer for Wales international Bale. (Daily Star)

But Red Devils boss Jose Mourinho is convinced he can sign Bale for less than £90m. (Don Balon, via Daily Express)

Chelsea striker Diego Costa, 28, will hand in a formal transfer request with the Premier League champions. (Independent)

Costa's lawyer has threatened legal action against Chelsea after the Blues vetoed a loan move to Italian side AC Milan before a January return to former club Atletico Madrid, after the Spanish side's transfer ban ends. (Mirror)

French champions Monaco are preparing a £45m bid for Arsenal and Chile forward Alexis Sanchez, 28, who is entering the final year of his contract with the Gunners. (Sun)

Tottenham are interested in Genoa forward Giovanni Simeone, the 22-year-old son of Atletico Madrid boss Diego. (Mirror)

Everton boss Ronald Koeman is still hoping to sign another forward this summer, with Arsenal and France striker Olivier Giroud, 30, a potential target. (Liverpool Echo)

Southampton defender Virgil van Dijk, 26, is likely to miss the opening of the Premier League season with his future looking increasingly uncertain. (Telegraph)

Chelsea are ready to challenge Liverpool for Van Dijk by offering Saints £50m for the Netherlands centre-back. (The Times - subscription required)

Sunderland are set to sell 29-year-old winger Jeremain Lens after agreeing a £4.5m fee with Besiktas. (Sunderland Echo)

The Black Cats are in advanced talks with Aston Villa over a loan for Scottish striker Ross McCormack, 30. (Daily Mail)

Belgian club Anderlecht have entered the race to sign 31-year-old Barcelona defender Thomas Vermaelen, who is also a target for West Brom. (Birmingham Mail)

Newcastle will face competition from a host of clubs for the signature of 28-year-old Arsenal forward Lucas Perez. (Talksport)

Tottenham midfielder Moussa Sissoko, 27, is in talks over a loan move to Turkish side Trabzonspor. (Evening Chronicle)

Watford have made an enquiry about Liverpool's 25-year-old left-back Alberto Moreno. (IBTimes)

The Hornets hope to bring in Everton's 30-year-old winger Aaron Lennon on loan before the new season starts. (Watford Observer)

Bournemouth have had a bid of around £20m for winger Demarai Gray, 21, rejected by Leicester. (Sky Sports)

But the Cherries could return with an improved offer for England Under-21 international Gray. (Daily Star)

Crystal Palace manager Frank de Boer is interested in signing 19-year-old Manchester United defender Timothy Fosu-Mensah, who played under his fellow Dutchman De Boer at Ajax. (Sun)

Middlesbrough's England Under-20 midfielder Harry Chapman, 19, has held talks with Blackburn Rovers. (Evening Gazette)

Meanwhile...

Arsenal forward Alexis Sanchez kissed the club badge in front of the cameras during training on Thursday. (Telegraph)

The Gunners' Emirates Stadium has gone 100% 'green' by switching to renewable energy. (IBTimes)

As Neymar signs a world record deal with Paris St-Germain, Sir Stanley Matthews' first professional contract with Stoke City is going up for auction. His weekly wage was £5. (Stoke Sentinel)

Did National League North club North Ferriby United pip PSG to the post? (North Ferriby United)

PSG attacking midfielder Javier Pastore has offered Neymar his number 10 shirt, saying: "I want to make him feel comfortable and happy from day one." (PSG website)

Ex-Tottenham manager Harry Redknapp, now in charge of Birmingham, says Spurs have the best starting XI in England. (Talksport)

Two lower-tier American teams have asked the Court of Arbitration for Sport to impose promotion and relegation on the US football pyramid. (NBC)

Dating app Tinder have confirmed they are interested in sponsoring Manchester United. (Daily Mail)