The Frenchman lays the blame for recent away defeats at the door of the officials but insists his side can be a Premier League force once it has a fully fit squad.
Nathan Dyer took a tumble in the box under a challenge from Aaron Ramsey in the first half, although replays suggested the former Southampton winger had merely stood on Ramsey's leg. Arsenal also lost its last away game at Fulham after seeing Johan Djourou controversially sent off.
"We played against a good side but we have lost the last two games in very special circumstances," Wenger told Sky Sports.
"I think we were very unlucky because it was never a penalty but after that I feel we were guilty because when we got back to 2-2 I felt there was space to win the game."
Arsenal has conceded more goals away from home than any other Premier League side so far this season. When asked if he was concerned at his side's leaky back line, Wenger replied, "Recently, yes."
"Maybe it's down to the fact that we have shuffled the defense around, every week we have a different defense and some players are playing out of position," he added.
"But I still feel in the last few games we've given very, very cheap goals away in massive, important games and you cannot afford to do that at our level."
Wenger also praised the performance of Brendan Rodgers' team, saying, "They played well and they are a good side, I do not want to take anything away from them but they had a lot of possession in their own half."
Despite their recent stutter in form, Wenger is still confident his side can be a success when their injured players return to action.
When asked if a full-strength squad could be challengers for the title, he replied, "I think so, yes. At the moment we have problems but I am hopeful that they will not be deadly."