Joe Hart admitted he was "moping around" after missing out on England's World Cup squad but is now "filled with desire to get back to the top".
West Ham are interested in signing Nice midfielder Jean-Michael Seri, according to Sky sources.
West Ham boss Manuel Pellegrini is confident the "pace and power" of club-record signing Issa Diop can help the defender make an impact in the Premier League.
West Ham have signed goalkeeper Lukasz Fabianski from Swansea City on a three-year deal.
West Ham have confirmed the signing of France U21 centre-back Issa Diop from Toulouse on a five-year contract.
West Ham and Swansea are continuing negotiations on Monday over a deal -thought to be worth around £7m - for goalkeeper Lukasz Fabianski, according to Sky sources.
Issa Diop will undergo a medical at West Ham ahead of a £21.9million move from French club Toulouse, according to Sky sources.
West Ham have re-opened talks to sign Paris Saint-Germain midfielder Javier Pastore, according to Sky sources.
West Ham remain in talks with Swansea over deals to sign defender Alfie Mawson and goalkeeper Lukasz Fabianski, according to Sky sources.
West Ham will begin their Premier League campaign with an away match against Liverpool on August 11.