Wasps coach Shaun Edwards said his side's never-say-die attitude was responsible for what could prove to be the comeback of the season.
They were dismantled by visitors Leicester during a first half of six tries and some alarming defence by the hosts which left them trailing 30-18. Wasps stormed back in the second period thanks to the ruthless goal-kicking and game-management of former England fly-half David Walder.
Edwards said: "Our defence first half was poor but it was very good in the second. We said at the break that we can go out there and win that game."
He added: "With our fly-half David Walder on that form we made sure we did not go out there and try big plays in the second half but play sensibly.
"Mark van Gisbergen has some work to do in terms of defence as a result of that missed tackle for one of their tries, but then he made a try-saving tackle earlier, as he has often done.
"I told the boys to be calm and not chase things too much but get our defence solid and build our way back."
Leicester rugby director Richard Cockerill appeared surprisingly calm after seeing his team lose their interval lead.
He said: "The second half performance was disappointing and while I seem calm, I'm angry inside. We did take two points from the game, but we should have had five. We could go home all doom and gloom and sulk, but on the other hand we played some tremendous stuff in the first half. We had opportunities but we coughed up ball and made mistakes.
"Then at the end, a mistake by Geordan (Murphy), sees them score a try and he's feeling down. But that guy has won more games for us than he has lost and will get our full support.
"We did suffer from losing Jeremy Staunton at half-time with an Achilles injury, which left us with two young lads in the key play-making areas. But all the players will be the better from this experience."