Officials at a Copa Libertadores match in Brazil had to think outside the box when faced with no available electronic board.
Hand-made paper signs were used to get them out of the jam during the game between Atletico Mineiro and Uruguayan side Defensor Sporting.
It was a blast from the past as the fourth official held aloft individual numbers to indicate substitutions and the amount of injury-time.
The game itself, in the third stage of the competition, will not be written into the history books after it ended goalless with Atletico winning the tie 2-0 on aggregate.
Atletico will hope to have all systems back up and running when they face Nacional, Cerro Porteno and Zamora in the group stages.