An earthquake failed to stop Alexander Zverev from beating fellow German Dominik Koepfer to reach the Mexican Open final in Acapulco.
Zverev, who prevailed 6-4 7-6 (7-5), said he "didn't know what happened" and continued to play as the stadium shook.
"The lights started shaking and the crowd felt it more than we did," said world number seven Zverev, who faces Stefanos Tsitsipas in the final.
"We just heard the crowd. We were running around the court, so we had to play a point during the earthquake.
"We didn't feel much, but still obviously I know it happens here in Acapulco.