Unai Emery insists there remains room for improvement from his Arsenal side despite their comfortable Europa League win over Vorskla Potalva. The Gunners raced into a four-goal lead as a Pierre-Emerick Aubameyang double, a Danny Welbeck header and a tap-in from substitute Mesut Ozil set them up for a big win.

But Vorskla rallied and halved the arrears as Volodymyr Chesnakov pulled one back before Vyacheslav Sharpar scored with the final kick of the evening as the opening Group E clash ended 4-2. Emery made eight changes from the weekend win at Newcastle as goalkeeper Bernd Leno was handed his debut. The Spaniard also gave fellow summer signings Stephan Lichtsteiner and Lucas Torreira their first starts but, despite marking his first European game in charge of Arsenal with a win, he was left with some frustration.