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Diego Simeone has told Atletico Madrid he will only stay at the club if they bring Chelsea striker Diego Costa back to the Vicente Calderon this summer.
West Ham are not willing to sell teenage midfielder Reece Oxford despite increasing interest from Manchester United.
Southampton are set to bring Arsenal defender Calum Chambers back to St Mary's Stadium on a season-long loan deal.
West Ham are in talks to sign AC Milan striker Carlos Bacca after the San Siro outfit accepted a bid in the region of €20 million from the Irons.
Sunderland are set to hold talks with Diafra Sakho after West Ham accepted a bid of £10 million from the Black Cats for the striker.
Stoke City lead the race to sign Aston Villa midfielder Jack Grealish after he impressed for England at the Toulon Tournament, though Tottenham and Everton are also monitoring his progress.
Juventus full-back Stephan Lichtsteiner has verbally agreed to join Chelsea this summer with his place in Turin set to come under threat from Dani Alves's arrival.
Arsenal are one of a host of clubs to have shown an interest in signing Inter full-back Jeison Murillo, though Leicester City and Stoke City are also keen.
Tottenham have joined the race for Rennes defender Sega Coulibaly with Napoli and Sporting also interested in the 19-year-old.
Having fallen out of favour with Jose Mourinho at Chelsea, Juan Mata is weighing up his future at Manchester United and could be in line for a move to Barcelona.