It might not be one of the grand old rivalries of the European game -- Sir Alex Ferguson's Manchester United against Juventus, the ripples of the "remontada" when Barcelona and Paris Saint-Germain -- but there tends to be something in the air when Arsenal face off against Olympiacos.

In 2015, David Ospina contrived to carry a corner into his own net before Olivier Giroud saved the Champions League bacon with a brilliant hat trick against Piraeus. Six years later, the Gunners nearly blew an impressive first-leg lead with one of the most bafflingly meek performances in their European history. Those ties, however, are barely fit to clean the dramatic boots of the trilogy's finest hour, the thrills and spills at the Emirates Stadium in the first knockout round of the 2020-21 Europa League

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