Manchester United have been linked with Alexis Sanchez, Romelu Lukaku wants to leave Chelsea and David Santon could return to Italy.
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Bastia have signed France Under-21 international goalkeeper Alphonse Areola on loan from Ligue 1 champions Paris St Germain.
Areola has had few opportunities to impress at the Parc des Princes but played 35 matches to help Lens gain promotion to the top flight last season.
He will again go out on loan this term, with the Corsican club confirming they had snapped up the 21-year-old, although the length of the deal was not mentioned.
Paris St Germain have signed right-back Serge Aurier on a season-long loan from Ligue 1 rivals Toulouse.
The Ivory Coast international will spend the entire 2014-15 campaign at the Parc des Princes with the defending champions having the option to make the deal permanent.
Paris St Germain have been instructed by UEFA to close two sections of their ground for their next European match at the Parc des Princes.
UEFA's control, ethics and disciplinary body has imposed the sanction for the discriminatory conduct of PSG supporters towards disabled Chelsea fans on April 2.
Paris Saint-Germain have announced the signing of Brazil defender David Luiz from Chelsea.
The 27-year-old will join the French champions following the World Cup, where he played in Thursday night's opener against Croatia in Sao Paulo.
A statement on the French club's website, www.psg.fr, read: "Paris Saint-Germain are pleased to announce that for a period of five years Brazilian international David Luiz has moved from Chelsea FC.
"He will join the group after the World Cup."