Agnieszka Radwanska, the fourth seed at the 2013 Western & Southern Open has decided to withdraw from her quarterfinal match with Li Na of China due to personal reasons related to the death of her grandfather on Sunday.
"I'm very sorry that I have to withdraw from the tournament. Unfortunately, my grand-dad passed away last Sunday," explained Radwanska in a statement provided to the media.
"The funeral is going to be Saturday and I need to be there.
"I am disappointed to not continue with the tournament, especially because of my form so far this week.
"It was a difficult decision, but I need to be go home and be with my family."
Radwanska decided to pull out of the tournament after her 6-0, 6-2 win over Elena Vesnina of Russia on Thursday and head back to Poland. Radwanska attended all the events that went along with the tournament including the WTA All-Access Hour on Monday.
Li Na now gets a walkover into the semifinals which will be played on Saturday.
Radwanska is in the midst of possibly her best season.
She won titles early in the year at Auckland and Sydney, reached the quarterfinals of the Australian Open, the semifinals of Wimbledon and last in the finals last month at Stanford.
Radwanska's sister Urszula is also a highly ranked women's player.