Manchester City are close to signing Benfica's Ederson in a deal that could be worth more than the £33m paid by Juventus for Gianluigi Buffon in 2001.
M'Baye Niang has opted against joining Watford permanently following the end of his loan spell.
Gab Marcotti explains why Manchester City could break the goalkeeper transfer fee record to get Benfica's Ederson.
Guinea international Keita was one of the stars of the season as Leipzig finished second in their debut Bundesliga campaign.
Juan Mata says a "lack of consistency" cost Manchester United any hope of lifting the Premier League title this season.
Chelsea legend Lampard, 38, ended his 21-year playing career earlier this year and has said he wants to move into management.