Arsenal continued their unbeaten away form this season with a comfortable victory at the City Ground.
Pajtim Kasami passed up the clearest chance of the early stages, slicing wide when he was found unmarked in the box by Nicklas Bendtner. Swiss midfielder opened the scoring with his second speculative strike of the week, firing past Stojkovic with a slightly deflected effort from 35 yards.
New signing Lucas Perez made it two from the spot after former Chelsea defender Michael Mancienne had brought down Chuba Akpom in the box. The Spaniard added another minutes later as he cut through the defence before rounding Stojkovic to slot into an empty net.