Arsene Wenger insists his woeful record against Jose Mourinho will have no bearing on Arsenal's top-of-the-table clash with Chelsea at the Emirates Stadium on Sunday. Wenger has failed to win in 12 games against Mourinho across the Portuguese coach's two spells at Stamford Bridge, drawing five and losing seven of their clashes. But the Arsenal manager says the past shared between the two managers on the touchline in Sunday's 4pm kick-off will be irrelevant as the Barclays Premier League's top two sides face off. Arsene Wenger has drawn five and lost seven of his 12 clashes with Jose Mourinho ahead of facing Chelsea . Wenger and Mourinho rowed on the touchline in October's 2-0 win for Chelsea in the reverse fixture . 'I think we have not always lost in 12 attempts. We have been close,' Wenger said. 'Having said that, the result on Sunday will just be down to the performance on the day. We are on a good run and we have an opportunity at home to beat them and we want to take it. 'We have a good run of form and good belief and solidarity. We have passed many tests recently when we were questioned. We have another test on Sunday that we want to pass. 'Chelsea's strengths are they have been very efficient on counter attacks and set-pieces as well. We have to nullify their strengths.' Asked about his frosty relationship with Mourinho, Wenger said: 'I do not want to talk about that. What is interesting for people is when the game starts at 4pm we have a great game. It is not about the relationship between the managers.' The managers of London's two biggest clubs have long had a frosty relationship in the opposing dugouts . Cesc Fabregas set up Diego Costa to seal a 2-0 victory for Chelsea against Arsenal earlier this season . Arsenal are 10 points behind Chelsea but come into the game on the back of excellent form. Wenger said: 'Look, mathematically it will be possible, yes, but Chelsea has their future and the championship in their hands. We can get closer and we have an opportunity to do that at home and want to take it.' Wenger added: 'They have been very consistent until now. They have fewer losses than any team. The Premier League rewards consistency. On that front they gave been defensively very strong and consistent.' Fabregas gets ahead of his now-team-mate Branislav Ivanovic to score against Chelsea for Arsenal in 2010 . Sunday's game marks the return of former Arsenal midfielder Cesc Fabregas, who will be wearing Chelsea blue at the Emirates for the first time. Fabregas left for Barcelona in 2011. Arsenal supporters are expected to give their former hero a hot reception after he joined their fierce rivals, but Wenger has asked for some respect for one of their best players of the last decade. 'I want every player to be respected, and Cesc Fabregas when he comes to the Emirates on Sunday to be respected like he deserves,' he said. Asked if he regretted not signing Fabregas in the summer when he had the option to, Wenger added: 'The regret I have is that he wanted to leave here. 'This club and myself had a very positive influence on Cesc’s life, so I would be a bit uncomfortable to have to justify today why he is not here. I believe I would rather it was the other way around.' Wenger is without Alex Oxlade-Chamberlain and Mikel Arteta on Sunday, while Per Mertesacker is rated as '50-50' by his manager having not trained at all this week. Gunners fans welcome back Fabregas with Barcelona, but the reception is likely to be more frosty this time .
Arsenal face table-topping Chelsea at the Emirates Stadium on Sunday . Cesc Fabregas returns to the Emirates with Chelsea for the first time . Arsene Wenger says his record against Jose Mourinho will have no impact . Alex Oxlade-Chamberlain and Mikel Arteta are set to miss out on the game . Per Mertesacker is '50-50' for the game having not trained at all . READ: 'Proud' Alexis Sanchez targets 'many titles' with Arsenal .