With Milan back in the Europa League after a successful appeal against their financial fair play violation, the focus turns to toppling Juventus.
Milan's exclusion from the Europa League would have meant Atalanta taking their place in the group stage.
Romanian referee Marius Avram was stretched off after falling over whilst in charge of a Europa League qualifier in Hungary.
A year after being humbled by Luxembourg part-timers Progres Niederkorn, Rangers advanced to the second round of the Europa League qualifiers.
Rangers handed Steven Gerrard a win in his first competitive match as a manager by beating Macedonian side Shkupi 2-0 in the Europa League.
UEFA has announced that clubs will be permitted to make a fourth substitution in extra time in the Champions League and Europa League.