"I felt that after our performance in the Champions Trophy there was unnecessary criticism on me and it did affect me. That is why it was very important for us to do well in the West Indies," Whatmore told the "Express" newspaper on Sunday.
The Australian has come in for harsh criticism from many quarters in recent times after failing to live up to expectations since he took charge of the national team in March, 2012.
But the former Australian batsman, who has also coached the Sri Lankan and Bangladesh team, said the victories in the West Indies had helped raise the morale and spirits of the team.
"The victories came at the right time for us and they were hard earned wins because the West Indies have a strong one-day unit and are world T20 champions and are not easy to beat in their own backyard," Whatmore said.
"I don't want to say much on this issue as the PCB is already looking into the matter but as far as I am concerned I see the report as rubbish because I know in the West Indies the players were totally focused on cricket and doing well in the series," he said.