The Atletico team has its sights set on a young center back from the Premier League.
The Gunner team put together the best defensive rotation in all of Europe with the intention of winning titles.
Cristhian Mosquera will leave Valencia in the coming days and will strengthen Arsenal's defensive axis under Mikel Arteta.
The team has been negotiating for weeks to extend the contract of the Spanish center, but many problems have arisen.
Valencia has offered a contract extension to Cristhian Mosquera, but the Colombian could head to the Premier League.