BREAKING: Arsenal to officially announce second summer signing TOMORROW as Gunners step up transfer business

Arsenal are reportedly set to announce the signing of Real Sociedad midfielder Martin Zubimendi tomorrow.
 

The 26-year-old's move to Arsenal is understood to have been done for several months, despite reports in recent times suggesting Real Madrid were considering a late hijack.

Now, it looks like the speculation regarding the Spaniard's future is finally set to end.

Arsenal insider Team News and Tix reports that the club will officially announce Martin Zubimendi tomorrow.

The midfielder is set to become the Gunners' second summer signing, after goalkeeper Kepa Arrizabalaga officially joined the club yesterday.