Olympiacos, meanwhile, have yet to register a victory in this year's Champions League, losing 2-0 to Arsenal and drawing 0-0 with Pafos FC in their first two fixtures of the campaign. This year marks their return to the continental showcase after missing out on qualification in the last three seasons.

Chelsea will look to continue a good run of form as it contests its 200th UEFA Champions League fixture on Wednesday against an Ajax team desperate to get off the mark.

It is now three wins from three in the Champions League this season with no goals conceded.

Villarreal would have been the designated home team, but it was much more likely to have felt like an extra home game for Barca, given their global fanbase.

LaLiga announced Tuesday that the Dec. 20 game had been canceled because of “uncertainty that has arisen in Spain over the past few weeks.”

"Today, Spanish football has lost an opportunity to advance, project itself globally, and strengthen its future," Tebas wrote on X.