Blues' manager credits hosts for equalizing despite the fortunate nature of the goal, insisting that his side was up against a team with momentum at the DW Stadium
Daniel Sturridge had put the visitors ahead deservedly on the hour mark but, as the minutes ticked away, Cech parried a simple toe poke into Jordi Gomez's path and the Wigan man tapped home into an empty net.
Villas-Boas and the Blues were unable to continue their momentum gained after last week's result against league leaders Manchester City, and the manager indicated he had hoped for better.
"It's a disappointing result, just three minutes from the end we conceded the goal," the Portuguese boss told ESPN. "It was a hard fought game with many chances, sometimes maybe more from Wigan. They fought hard to get a good result here."
Villas-Boas explained that the equalizer could have been avoided if Chelsea had been more careful with the ball in the closing stages of the game.
"I think in the last moments if we had kept the ball a bit better we would have taken the three points away but I think Wigan at that time had the momentum," he said. "They got the goal they deserved, I think in the end it was a fair result."
Villas-Boas dismissed suggestions that his side were complacent after scoring, instead affirming that Wigan deserved the result despite its fortuitous nature.
"No, Wigan fought very, very hard today. It is always a battle in the Premier League," he said. "We didn't get the three points that we thought we could get, but we have to fight in the right spirit. We have a massive game against Tottenham on Thursday and we have to continue to progress."