Here’s the top transfer-related stories in Sunday’s newspapers…

Manchester United have begun a complex £100m deal to sign Real Madrid’s 25-year-old midfielder Gareth Bale – with David de Gea, 24, heading to the Bernabeu. (Sunday People)

But according to another report, Real are ready to make a world-record bid for De Gea, with no Bale involvement. (Daily Star Sunday)

Meanwhile, United will attempt to renegotiate the £43m transfer fee they agreed to pay Monaco for Radamel Falcao, 28, should they decide to keep the striker beyond his season-long loan. (Daily Telegraph)

Arsenal, Liverpool and Manchester City have enquired about Falcao’s availability as the Colombia international struggles at the Old Trafford club. (Sunday Times)

Tottenham Hotspur have renewed interest in winger Yevhen Konoplyanka, 25, who plays for Ukranian side Dnipro and is out of contract in the summer. (Mail on Sunday)

Liverpool will be open to allowing striker Rickie Lambert, 32, to leave the club if they can recall 19-year-old striker Divock Origi, who they signed last summer, early from his loan at Lille. (The Sun)

Everton manager Roberto Martinez will meet Samuel Eto’o, 33, this weekend to discover his plans as the striker edges closer to leaving Goodison Park. (Mail on Sunday)

Toffees forward Kevin Mirallas, 27, has 18 months left on his contract with the Goodison Park club and is a target for German club Borussia Dortmund. (Sunday People)

Manchester United and Chelsea have been handed a transfer boost as the wife of Real Madrid midfielder Luka Modric, 29, is unhappy in Madrid and could play a major role in her husband’s return to the Premier League. (Sunday Express)

Crystal Palace want to sign Swansea left-back Neil Taylor, 25, and Blackburn Rovers forward Rudy Gestede, 26, for a combined £9m. (Sunday Telegraph)

Eagles boss Alan Pardew is also considering whether to return to former club Newcastle to try to sign 29-year-old striker Papiss Cisse. (Sunday Mirror)

Real Sociedad manager David Moyes is waiting for an answer from Arsenal boss Arsene Wenger about signing Gunners striker Joel Campbell, 22, on loan. (Sunday People)

Manchester United will wait until the summer to make a move for Borussia Dortmund defender Mats Hummels, 26, and Roma midfielder Kevin Strootman, 24. (Sunday Mirror)

Manchester City manager Manuel Pellegrini has played down reports that the club are weighing up a move for 27-year-old Barcelona forward Lionel Messi. (Sunday Times)