Nadal into fourth round after playing just one match

Two-time champion Rafa Nadal was gifted a place in the last 16 of the BNP Paribas Open when Argentina's Leonardo Mayer withdrew before their third-round match with a back injury.

Spaniard Nadal, who said he had been "very scared" after experiencing his first earthquake a few hours earlier, will next face Latvian Ernests Gulbis, who fought back to beat Italy's Andreas Seppi 5-7, 6-3, 6-4.