Wigan Athletic chairman Dave Whelan admits he would have sold six players if relegated.
Whelan was all smiles at the end as Wigan made it back-to-back wins for the first time in 26 months.
Martinez said: "It would be foolish to say we can keep all of the players, it is the modern game. But there is a time and a price.
"I am so pleased for the chairman, he is a great human being. He is on cloud nine. The emotion he showed at the end was real. He is a winner, an inspiration. Sometimes it's extra pressure, you don't want to let him down."
