The national power outage stopped at the Madrid Open and Britain's Jacob Fearnley was forced to leave the court.
Fearnley saved a match point in the third round against Bulgaria's Grigor Dimitrov and will land 6-4 5-4 when the match is suspended.
Power cut refers to the electronic wire call system that has replaced the Line Judge – the scoreboard stops working.
After a brief delay, the referee announced that the game will resume and he will call instead of the system.
However, the spider camera hanging on the court has been stuck in place and in the player's eyeliner.
After further discussion, the referee brought the player back to the locker room.
