The 24-year-old Swiss goalkeeper never played in a first-team game during his seven-and-a-half-year spell at Villa Park.
The Arsenal midfielder is part of England's squad for Euro 2016.
Aston Villa youngster Callum Robinson is reportedly a target for Fulham and Preston North End.
Should Tottenham make a move for Liverpool's Christian Benteke?
Crystal Palace are reportedly interested in signing Andros Townsend from Newcastle United in the summer transfer window.
Rangers are reportedly keen to land Costa Rican goalkeeper Esteban Alvarado.
Former Southampton player believes Saints fans will be devastated if Everton lure Ronald Koeman.
As if the Manchester United ace could not be missed already...
Southampton-linked Calum Chambers will reportedly leave Arsenal for Watford on a season-long loan deal in the summer transfer window.
Welcome to this evening's transfer round-up. This edition features 'Manchester City said seriously looking at Alexander Zinchenko' and 'Chelsea looking at Leroy Sane?' plus more, so delve in below.
Everton and Chelsea will face each other in the Premier League this weekend.
Leeds United are said to be interested in signing Brighton & Hove Albion's David Stockdale.
Tottenham Hotspur and Arsenal will face each other at White Hart Lane in the North London derby this weekend.
Leeds United have hit a bad run of form at the worst possible time.
Disturbance said to have occurred during CEO's speech.
The revelation comes from a 2014 interview in Portugal from the new Ibrox manager.
Aston Villa and Leeds United have been tipped to make a move for Barnsley's Marley Watkins - and the Tykes may have already identified a replacement.
Eder is reportedly being targeted by West Brom - but just imagine how exciting Southampton would be if he links up with his former Sampdoria strike partner.
Ibrox side Glasgow Rangers are set to take on Celtic at the weekend.
Brighton & Hove Albion's David Stockdale impressed under Steve Bruce while the Aston Villa boss was manager of Hull City, but his loan deal never became permanent.