The 21-year old attacker has had plenty of interest in the off-season and although it is good for his confidence, Martinez indicated that he will not be sold prior to close of the transfer window.
"For Victor it's been an exciting summer," he said.
"I spoke with him and told him he should be very proud, as a footballer at 21, to get the interest he has had. It's something to be happy and extremely proud about and is a football compliment.
"But, if you don't meet a valuation, it becomes paper talk and speculation. He is a young man and he knows what he did from December to the end of the season was a great level of performance.
"He can take it on to the next level and I am very excited to have Victor at Wigan, and I hope we can keep him for many years to come.
"Victor is fit and available for the squad (for tomorrow's season opener against Chelsea) and that's what matters."