Chicharito came off the bench in the 64th minute of Saturday's contest with the Cherries and would net the Hammers' goal less than ten minutes later, slotting home after some excellent interplay with Marko Arnautovic.
“Chicharito is a true professional," Zabaleta said after the match. “Even though he's not played as much as he would like recently he's kept training well and he's remained focused. He's been a great professional.
“This is what you need from substitutes. He came on and made a big impact in the game and he scored today. It was a great finish from Chicharito."
The defender also had kind words for Manuel Lanzini, who put in a strong performance before exiting the field with what looked to be an injury.
On his fellow Argentinian, he added: Hopefully, it's not too bad. We need to wait for the scan. Manuel is one of the most important players for our team and he played 120 minutes on Tuesday. Players like him make so many sprints during the game."