Caulker, who is believed to have a release-clause in his Cardiff contract following the Bluebirds relegation from the Premier League, has also been linked with Liverpool, Southampton, former club Tottenham Hotspur and Swansea City so far this summer.
But now Arsene Wenger is supposedly ready to make an approach for Caulker, to provide quality back-up for defensive duo Laurent Koscielny and Per Mertesacker.
Caulker appeared in all 38 of Cardiff’s Premier League games last season, scoring five times as one of their stand-out players. He was signed from Arsenal rivals Tottenham last summer for a fee of around £8million, and at the age of just 22, appears to be one of the rising stars of English football.
Arsenal have also been strongly linked with Caulker’s Cardiff team-mate David Marshall, with a fee of £15million being bandied about for the Scottish goalkeeper.
Caulker would prove a top signing for any of the Premier League’s big clubs, and it remains a surprise that none have pulled out all the stops to win his signature thus far.
His form for Cardiff last season was magnificent, with Caulker even earning another call-up to the England squad. The former Spurs man is a gifted, very able defender with sound awareness of his defensive duties, and his broad frame also makes him a threat in the opposing penalty area.
At 22 years of age, he also has time on his side. Sure to be an international regular one day, he would be a strong successor to both Koscielny and Mertesacker at the Emirates.
The question remains whether Caulker will prioritise first-team football over eventually featuring for one of the Premier League’s biggest clubs. His move to Cardiff from White Hart Lane last summer suggests he will.