Arsenal plan to overhaul their centre-half options this summer.

Question marks remain over the future of Arsenal's defenders with Shkodran Mustafi coming in for criticism of late and Laurent Koscielny turning 34 in September.

And the Daily Mail says Arsenal are showing interest in several centre-half options, including Gremio's Argentina defender Walter Kannemann.

Arsenal are also among the contenders to sign Kannemann's international teammate, Ajax left back Nicolas Tagliafico and are monitoring developments with Manchester United midfielder Ander Herrera, who has still to agree a new contract.