He has however admitted that the Dutch international striker could leave.
Ray Parlour has suggested that Southampton should look at Frank De Boer or David Moyes, who were both linked with Everton.
Tottenham Hotspur have targeted signing a new striker this summer.
The Owls have yet to formally announce their pre-season plans.
England drew 1-1 with Switzerland during the opening game of Euro 96 at Wembley, in what was one of the more memorable international tournaments.
Joey Barton has headed to Ibrox to join Glasgow Rangers while Brendan Rodgers is the new Celtic manager.
The Newcastle United star has been targeted by Crystal Palace, Southampton and West Ham United.
The talented youngster is believed to be attracting the interest of Mauricio Pochettino.
The New Zealand captain scored a 40-yard free-kick, with a little help from the New Caledonia stopper.
Liverpool tried to sign Westwood 18 months ago.