Arsenal are shopping for three young defenders this summer.
The Mirror says Arsene Wenger's side have been criticised defensively this season as their title bid stumbled in 2016.
A run of two wins in nine Premier League games saw the team drop down the table, and they are now looking to bring in some young guns to freshen things up.
Atletico Madrid's 20-year-old Lucas Hernandez is being monitored as a possible replacement at centre-back for the ageing Per Mertesacker.
Meanwhile, Leicester left-back Ben Chilwell, 19, and Fulham full-back Ryan Sessegnon, 15, are also wanted.