Olympiakos vs Arsenal: 3 reasons why the Greek outfit can cause an upset in the Round of 32 | UEFA Europa League 2019-20

#3 The uncertainty that lies with the appointment of a new manager

Atalanta v Manchester City: Group C - UEFA Champions League

The dismissal of Unai Emery and the interim appointment of Freddie Ljungberg was thought to be the beginning of a massive damage-control project at the Emirates. However, the Gunners have instead found themselves with a caretaker manager who has not only failed to impress in his short stint but one who is anxious for the hierarchy to make a permanent appointment soon.

Arsenal have seen three different managers in charge in the previous two seasons and none have brought any form of stability to the team. Carlo Ancelotti, Marcelino, and Nuno Espirito Santo have all been linked with the vacant managerial post in recent weeks but it is former captain and Manchester City assistant manager, Mikel Arteta, who has emerged as the frontrunner in the race.

While the north London giants will likely have a permanent manager at the helm soon, the appointment of a seasoned tactician alone is no guarantee of a change in fortune. That the club is edging closer to the appointment of an inexperienced manager like Arteta puts even more uncertainty on the likelihood of any significant development.

Moreover, the chances of the players adapting to a new manager's tactics in such a short period are incredibly thin as was proven by Emery's one-and-a-half season stint at the Emirates.

Of course, anything could happen in the course of a two-leg fixture and Arsenal still boast of elite attacking talent in their squad, but if little to no technical changes are made by both teams, Olympiakos may just have the edge over their English counterparts.