Viktor Gyokeres scored twice as Arsenal sent out an emphatic Premier League title warning to Manchester City with a 3-0 victory against Fulham at the Emirates Stadium. Bukayo Saka, making his first start since Arsenal lost to City in the Carabao Cup final on March 22, was the architect, laying on Gyokeres’ ninth-minute opener before he then doubled his side’s advantage with five minutes of the opening period left. Gyokeres increased Arsenal’s tally to three prior to the interval when he headed home Leandro Trossard’s cross in first-half stoppage time. The Gunners now lead City by six points, with a better goal difference of four having played two matches more. Pep Guardiola’s side are up against Everton at the Hill Dickinson Stadium and then at home to Brentford before Arsenal’s next league outing against relegation-threatened West Ham, a week on Sunday. Arsenal have been a bundle of nerves at the Emirates for much of the calendar year as they chase their first league title in 22 years.…