Tottenham have agreed a deal to sign highly-rated defender Eric Dier from Sporting Lisbon.
West Ham have signed defender Carl Jenkinson from Arsenal on a season-long loan.
Tottenham manager Mauricio Pochettino has put his faith in Danny Rose by handing the left-back a new five-year contract.
The agent of Porto's Juan Quintero has played down reports linking the Colombia star with an imminent move to Arsenal.
Dusan Tadic, Steven Davis and James Ward-Prowse earned Southampton a 3-1 friendly win at Brighton on Thursday night.