Scotland international Robertson has signed a long-term contract and moves to Anfield for an undisclosed fee, reported to be around £10 million.
Aston Villa have signed veteran defender Chris Samba on a free transfer.
Chelsea goalkeeper Jamal Blackman is in line to join Bolton Wanderers on loan, sources close to the Premier League club have told ESPN FC.
Aston Villa have signed Stoke midfielder Glenn Whelan in a deal that could rise to £2 million.
Newcastle have announced the signing of winger Jacob Murphy from Norwich for an undisclosed fee.
Leeds have announced the signing of defender Matthew Pennington on a season-long loan from Everton.