The Everton manager expects his fellow Spaniard to "surprise a lot of people" as he continues a thus-far-successful career as Steve Clarke's successor at the Hawthorns
Martinez takes his side to the Hawthorns on Monday, providing the opposition for his fellow Spaniard's first game in English football, and he expects his counterpart to do well.
"Pepe Mel will surprise a lot of people," the Toffees boss said at a pre-match press conference, held under the glare of makeshift lighting following a power cut. "He has done a remarkable job wherever he has been.
|10/1||West Brom are 10/1 with PaddyPower to beat Everton 2-1|
As Martinez prepares to take on one of the English top flight's new faces, he has vowed to take his time over making any more additions to his squad to replace Nikica Jelavic, who has signed for Hull City.
"The January transfer window is never easy," he remarked. "We will take our time to make sure the right player joins this club but my focus is on bringing in another attacking option."
Everton have already welcomed Aiden McGeady to Goodison Park from Spartak Moscow during the winter window and the Republic of Ireland international could make his debut on Monday.
"Aiden is in the squad for the West Brom game," Martinez confirmed. "We feel he is ready to make a contribution.
"Sylvain [Distin] is fit for Monday's game. He has trained well. Ross [Barkley] is recovering well from his fracture but it is still too early to tell how long he will be out for."