It was plain sailing for Arsenal as they booked their place in the last sixteen of the Emirates FA Cup after hammering Southampton 5-0 at St Mary<span class=\"body1\"><span class=\"body1\"></span></span><span class=\"body1\"><span class=\"body1\"><span class=\"body1\"><span class=\"body1\">&rsquo;s Stadium on Saturday evening.<br /><br />In a perfect evening for the Gunners, two players who have recovered from injuries, England internationals </span></span></span></span><span class=\"name\">Danny Welbeck and </span><span class=\"name\">Theo Walcott, registered their names on the scorecard.<br /><br />W</span><span class=\"name\">elbeck put Arsenal 2-0 up within the opening 22 minutes, before Walcott increased the lead in the 35th minute.<br /><br />It became 4-0 when the Arsenal number 14 swept home in the 69th minute before he added more gloss to the scoreline with the final goal of the game with six minutes left on the clock.<br /><br />Nigeria national-teamer Alex Iwobi was introduced in the 72nd minute when Arsenal were four goals up and cruising. <br /><br />Igho Kingsley <br /><br />Photo Credit : arsenal.com<br /></span>