Arsenal's interest in Gary Cahill has swelled following an injury to defender Thomas Vermaelen, which looks likely to force the Belgian to miss the start of the season, according to The Daily Mail.
Vermaelen, who missed most of last season due to injury, picked up another injury in Saturday's defeat against Benfica.
And with his influential centre back now unlikely to start the season, Cahill is seen as the natural replacement as Arsenal build their squad ahead of the new season.
Arsenal have already had a bid of £12 million reportedly rejected for Everton's Phil Jagielka, but have been able to add Charlton Athletic's Carl Jenkinson.
Arsene Wenger is likely to require £17 million to prize Cahill away from the Reebok Stadium, a fee which is reported to be the England internationals release clause.
The likes of Scott Dann, who is also interesting Liverpool and Chris Samba, who is being watched by Tottenham Hotspur, have also interested Arsenal.