Slavia Prague
Alexandre Lacazette struck twice, including a penalty, while Nicolas Pepe and Bukayo Saka also found the net in the quarter-final second leg to set up a last-four clash with Villarreal.
Arteta called on his players to "create magical moments" in Thursday's Europa League quarter-final second leg against Slavia Prague.
Chelsea, who will face Eintracht Frankfurt in the last four, were cruising 4-1 at halftime but Slavia’s PetrSevcik slammed home two strikes early in the second half, narrowing the aggregate score to 5-3.
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