Officials for the Madrid Open cancelled Monday's play amid a blackout in Spain that impacted the tournament's facilities. The blackout caused a number of logistical problems at Caja Mágica with the scoreboards going dark and the loss of lighting to help fans navigate the venue:

Red Eléctrica, Spain’s electricity grid operator, ruled out a cyberattack, human error or unusual weather. Experts say it could take weeks to determine the cause.

One of Europe’s most severe blackouts grounded flights, paralyzed metro systems, disrupted mobile communications and shut down ATMs across the Iberian Peninsula.