Wigan manager Roberto Martinez admits he is 'scared' of more decisions going against his side when they travel to Arsenal on Monday night.
The Spanish boss labelled the referee's decisions "disgusting" after Wigan were beaten 2-1 at Chelsea last weekend, with both of the Blues' goals being scored from offside positions.
Victor Moses also saw what appeared to be a legitimate goal ruled out at Manchester United in midweek, before Shaun Maloney's strike sealed a historic 1-0 victory.
Martinez is wary of how officials will impact the game when the relegation-threatened Latics visit Emirates Stadium.
He told the Daily Mirror: "I am still scared if we are going to get a fair game in terms of having referees who don't get influenced by something.
"I feel - if we perform to our best - that we can compete against anyone. But there are other things that worry me.
"It has been difficult for us to have a level playing field against those teams."
Wigan were thumped 4-0 at home by Arsenal earlier in the season and Martinez is aware of the tough task his side face in North London.
He said: "We are very realistic. We played an Arsenal side here who were very clinical on the day.
"I think the team now is better than the team we played on that day. Some players now have belief that they are Arsenal players, they have really good partnerships.
"It is their best moment of the season, we know what to expect. We are confident but we know we will have to be perfect to be competitive on the day."