Inter and Roma close to missing out on Porto star
Herrera's contract is up in the summer at the end of the season and he is expected to leave the Portuguese club on a free transfer.
AS state that while Roma and Inter are linked with him and are interested in him too, Atleti have stolen the march on Herrera and have moved a step closer to signing him in the summer.
The 28-year-old has appeared in 24 league games this season, scoring four times.