The Premier League are investigating transfers and potential deals involving young academy players, a source has told ESPN FC.
Phil Jones has said Manchester United have enough "strength in depth" to cope without Paul Pogba and Zlatan Ibrahimovic at Middlesbrough.
Tottenham Hotspur are expected to receive the green light to play 27 "home" matches in front of Wembley's full 90,000-capacity next season.
Olsson, 34, would have been out of contract in the summer, but has reached a mutual agreement with Albion to terminate remaining months of his deal.
Striker played under Wenger during a three-year spell at Arsenal before joining Galatasaray in 2015.
Everton have been urged by the Everton Supporters Trust to bring an end to their partnership with StubHub amid claims fans are being exploited.