By David Ornstein & Nabil Hassan BBC Sport Arsenal are expected to confirm the signing of Southampton defender Calum Chambers for a fee of about £16m on Monday.
The England Under-19 international will join the Gunners’ Austria training camp after he underwent a medical on Friday.
Chambers, 19, has made 25 senior appearances for the Saints and Arsenal see him as an option at right-back, centre-back or in a more advanced role.
Arsenal have also enquired about Saints midfielder Morgan Schneiderlin, 24.
In a BBC Sport feature on England’s possible team for the 2018 World Cup, four of five national journalists questioned picked Chambers in defence.
Chambers would become Arsenal’s fourth summer signing following the arrivals of Barcelona forward Alexis Sanchez, Newcastle right-back Mathieu Debuchy and Nice goalkeeper David Ospina.
Manager Arsene Wenger is still in the market for a holding midfielder and another defender – if captain Thomas Vermaelen leaves the club.
Chambers would be the latest player to leave St Mary’s this summer following the departures of Rickie Lambert and Adam Lallana to Liverpool and Luke Shaw to Manchester United.
Calum Chambers could become the third youth team product to leave Southampton for Arsenal in recent years.
Alex Oxlade-Chamberlain followed Walcott to Arsenal in 2011 for £15m. The midfielder has scored five Premier League goals for Arsenal.
Walcott, Oxlade-Chamberlain and Chambers have made 79 league appearances for Saints between them.
Defender Dejan Lovren is also set to undergo a medical with Liverpool after the clubs reached agreement on a £20m move.
And Tottenham have made an enquiry for Saints striker Jay Rodriguez.
Any confirmed Chambers deal is likely to see right-back Carl Jenkinson, 22, leave Arsenal on loan to gain regular first-team football.