Watford have joined Arsenal and Tottenham in the race to sign Porto's Mexican midfielder Hector Herrera.

The 28-year-old box to box midfielder is out of contract in the summer.

He will be able to talk with clubs in the January transfer window on a summer free transfer move.

And it appears these three Premier League clubs have an interest, per the Watford Observer.

Others who have an interest include Inter Milan and Roma.