For a list of confirmed transfers, check out our transfers page.
Manchester United manager David Moyes will attempt to convince striker Wayne Rooney, 27, to stay at Old Trafford.
If Rooney still decides to leave the Premier League champions, Barcelona would be his preferred destination.
Chelsea have told Napoli they will not pay more than £40m for 26-year-old striker Edinson Cavani.
Arsenal are interested in £5m-rated Le Havre full-back Benjamin Mendy. The 18-year-old, who has appeared for France at every international level up to Under-19, is out of contract next summer.
Newcastle are preparing a £12m bid for 27-year-old Marseille striker Andre-Pierre Gignac.
Shakhtar Donetsk claim Liverpool target Henrikh Mkhitaryan has failed to report to their pre-season training camp in Austria, with the 24-year-old Armenian apparently frustrated his £23m deal to the Reds has not been secured.
Spanish side Villarreal will compete with Sunderland for Tigre full-back Lucas Orban, 24, after the conclusion of the Argentine league.
Carlo Ancelotti's arrival at Real Madrid as manager means the club will sanction 25-year-old striker Gonzalo Higuain's move to Arsenal or Juventus soon.
The Italian wants Liverpool striker Luis Suarez to join him at Real. Personal terms have been agreed with the 26-year-old, and the La Liga giants are confident they can sign the Uruguay international for less than his estimated £40m buy-out clause.
Ancelotti has also sanctioned a £20m bid for Corinthians and Brazil midfielder Paulinho, who was expected to join Tottenham.
Everton are interested in signing CSKA Moscow's 27-year-old midfielder Keisuke Honda as interest in their midfielder Marouane Fellaini, 25, increases.
Swansea boss Michael Laudrup is interested in Vitesse Arnhem's Ivory Coast striker Wilfried Bony, 24.
Manchester City defender Micah Richards, 25, is wanted by Inter Milan.
Stoke have identified Blackburn's Martin Olsson, 25, and PSV Eindhoven's Erik Pieters, 24, as possible solutions to their problem left-back slot.
Liverpool are interested in winger Gerard Deulofeu, with manager Brendan Rodgers hopeful that the presence of the 19-year-old's former Barcelona B team-mate Luis Alberto could see the Merseyside club beat strong competition for his signature.
GLOBAL GOSSIP (sourced by BBC Monitoring)
Monaco midfielder Alexandros Tziolis, 28, has joined Greek side PAOK FC.
Italian side Genoa have opened negotiations with Sevilla over Spanish defender Alberto Botia, 24.
Newcastle owner Mike Ashley is prepared to sell the club if he recoups all the money he has spent since his 2007 takeover, with the current debt owed to him believed to be £267m.
Paris St-Germain could still appoint Arsenal boss Arsene Wenger next summer despite bringing in Laurent Blanc as their new manager.
Outgoing England Under-21 manager Stuart Pearce will leave behind a detailed analysis of his players' failures at the recent European Championship.
Napoli president Aurelio de Laurentiis has shown an interest in taking over League One side Leyton Orient. The 64-year-old wants to replicate the Pozzo family, who own Serie A's Udinese, La Liga's Granada and the Championship's Watford.
Former Netherlands great and Barcelona manager Johan Cruyff believes the Spanish club should have considered selling forward Lionel Messi, 26, now they have signed 21-year-old Brazilian attacker Neymar.