Arsenal slumped to their fourth defeat in five Premier League matches on Sunday after going down 1-0 at home to Burnley. With 13 points from 12 games, Arsenal are off to their worst start to a season in almost 40 years and the pressure is building on manager Mikel Arteta, who was brought in last season to turn around the London club's fortunes. "I wouldn't say there's panic. I can see in training the way they try and the energy they put in," Arteta said. "A team that is struggling normally you don't see them play the way we were playing, and the way they played against Tottenham Hotspur. "But we lost the game, we gave the opponents a chance and they scored and at this level it is all about winning football matches." Arsenal's Granit Xhaka was sent off early in the second half before Pierre-Emerick Aubameyang scored an own goal. Scottish full back Kieran Tierney said the players had let Arteta down. "We are not showing the manager what we can do and how much we believe in him," Tierney said. "Every game there are signs we are doing a bit better but it is still not good enough. "There are no excuses. There is nothing I can say that will make people believe a positive thing is going to come out of this." Assessing the performances, James Capps provides his player ratings in the gallery above. To move on to the next photo, click on the arrows or if using a mobile device, simply swipe.