Brazilian teams Santos, Palmeiras and Sao Paulo have all been monitoring his situation, while Olympiacos and MLS side Charlotte FC have also enquired about Almiron's availability.
Havertz, 25, missed a penalty in Arsenal's shootout defeat at the Emirates on Sunday before his partner, Sophia reposted two abhorrent messages she had received on Instagram.
Barcelona midfielder Gavi says Lamine Yamal is the best player in the world after Lionel Messi following the teenager's devastating showing in Wednesday's 5-1 Copa del Rey win over Real Betis.