LIVERPOOL, England, Sept 17 (Reuters) - Arsenal claimed their first Premier League win at Everton for six years as Leandro Trossard's second-half strike proved enough to secure the points at Goodison Park on Sunday. Everton, still without a win this season, had managed to frustrate the visitors who had a Gabriel Martinelli goal ruled out for offside via VAR in the first period. Unbeaten Arsenal joined Tottenham Hotspur and Liverpool on 13 points from five games, two points behind leaders Manchester City who have a 100% record. Arsenal's last league win at Everton in 2017 ended the reign of Ronald Koeman and while Sean Dyche is unlikely to suffer a similar fate, he has a huge task on his hands. But Arsenal eventually unpicked their defence with a short-corner eventually being fed in to Martin Odegaard who released Bukayo Saka on the right side of the penalty area.