The Tigers were largely competitive against Wasps on Saturday but ultimately fell short in the end, suffering a 32-25 defeat at the Ricoh Arena.
O'Connor felt his side performed well but claims they must be more accurate if they are to pick up victories away from Welford Road.
He told BBC Sport: "They ripped into each other, it was pretty tight. The difference was probably that we didn't get enough scoreboard pressure in the first 20 minutes when we felt we were probably dominant, we went 10-0 up and we let them claw their way back into the game and that told at the end, we had to tackle a lot.
"They did a pretty good job, they executed, they looked after the ball and ultimately got the last score to get the result.
"I was pleased with a lot of aspects, the effort was great but to win away from home, you have to be more accurate than we were."