Russia's Maria Kirilenko defeated Spain's Maria Jose Martinez Sanchez 6-3, 6-7 (5-7), 6-1 on Sunday in the first round of the $2 million Pan Pacific Open.
Sanchez failed to qualify for the tournament, but was given a place in the main draw when China's Li Na withdrew with stomach pain.
Kirilenko was up 5-3 in the second set and looked to be on her way to a quick win but Sanchez fought back.