However, Whittingham says that his team did enough to win the game.
"How do you sum it up when you have totally dominated the game and only come away drawing? It's disappointing because we've played really well," he told the Portsmouth News.
"There are a team full of disappointed players that we haven't won the game. All you can ask is the effort we've put in and we did that. But I'm really pleased for Ryan Bird to get his goal."
Pompey are 16th in the league.