"I'm a dreamer", Hernandez told the club website ahead of Sunday's trip to Liverpool.
Arsenal have accepted a bid from Sporting Lisbon to sign Lucas Perez this summer, according to reports in the Portuguese media. But the Baggies are still hoping they can land the global midfielder with the lure of playing in what could be a very exciting season as they battle for promotion back to the Premier League.More news: First day of second Test between England and India abandoned at Lord's
However, while back on loan at former club Deportivo last season, the 29-year-old was responsible for creating a thoroughly impressive 79 chances for his teammates in 35 La Liga appearances, leaving him second only to Lionel Messi (87) in that regard. I'm very excited and looking forward to achieving lots, ' said Sanchez after completing his move.
West Ham director of football Mario Husillos is confident Perez will prove another valuable addition.More news: Everton complete triple deal for Mina, Andre Gomes and Bernard
However, in that time he did show flashes of the form that had earned him the move, accruing seven goals and five assists across competitions.
"He has great technical quality, and can play as both the main striker or the second striker in a deeper role".
"His style is different from the other strikers we have available to us, and that gives the manager more options for our attacking play".More news: Dozens dead in Yemen after school bus carrying children hit by airstrike