Arsenal slumped to a fourth consecutive Premier League defeat for the first time since 1959 after Pierre-Emerick Aubameyang's own goal handed Burnley a 1-0 on Sunday. The Gunners were again undone by a lack of discipline as Granit Xhaka's needless sending-off just before the hour mark turned the game in Burnley's favour. Aubameyang is still waiting for his first league goal from open play since signing a lucrative three-year contract in September, but scored at the wrong end when he flicked in Ashley Westwood's corner 17 minutes from time. Victory takes Burnley out of the relegation zone, while Arsenal creep ever closer to the drop zone as they sit 15th, just five points above the bottom three. "We need to put the ball in the net, that's what is missing," said Arsenal manager Mikel Arteta. "What we did and what Burnley did, there is no comparison. The Spaniard was hailed for his instant impact in leading Arsenal to the FA Cup last season, just eight months into his first senior managerial role. But Arteta is now under mounting pressure with little sign his side can turn things around and high-flying Southampton, Everton, Manchester City in the League Cup and Chelsea to come in their next four games. Arsenal have scored just twice in their last eight league games. England international Nick Pope repelled the home side before half-time with saves from Kieran Tierney, Aubameyang and Bukayo Saka. But Arsenal's momentum was lost when Xhaka was shown the third red card of his career at the Emirates for grabbing Westwood by the throat. "We know that these things are unacceptable and the moment that we are in now it's even more so," Arteta said. "We had complete dominance from the start to the moment that Xhaka was sent off. "We created all the chances, pressing, the attitude of the players was amazing the way we played in moments it was really good. "They are really willing and probably too willing in key moments, we overstepped the line and got a man sent off." Burnley relied on a set piece to make their one-man advantage count as Aubameyang unwittingly turned Westwood's teasing delivery into his own net.