Paco Alcacer had a great debutante season, scoring over 15 goals in all competitions in just half a season, since that is when he was given a chance by Valencia's former coach Pizzi. He has also started this season on a positive note, as well as scoring in his debut for the Spanish national team against Macedonia.
Suffice to say he is seen as one of the best talents in the world and with his current buyout clause at only 20 million euros he is seen as a bargain.
Its not just Arsenal that are interested in him either, other English clubs are interested in Paco, as well as few other clubs from other leagues.
Fortunately though Valencia CF is working on a new contract for Paco that would keep him in Valencia CF till 2019 and even more importantly raise his buyout clause over 50 million euros.