Serena Williams crushed her older sibling Venus 6-1, 6-2 to reach the final of Family Circle Cup in the most lop-sided match between the American sisters in their WTA Tour careers.
In the first match between them in four years, Serena needed just 54 minutes to send Venus packing in the first of two semi-finals on Saturday.
Defending champion Serena dominated from the opening serve against Venus who had eight double faults and won just 27 percent of her second serves on the green clay surface.
Venus, 32, even had trouble with Serena's 70 mph second serve which was considerably slower than Serena was serving in her quarter-final match on Friday.
Serena finished with six aces and won 75 percent of her first-serve points although she won just two points all match on her reduced second serve.
Serena now owns a 14-10 career win mark over Venus, which includes a 6-2, 7-6 (7/4) victory in their last contest in 2009 in the final of the WTA Championships in Qatar.
This was even more one-sided than when she beat Venus 6-2, 6-2 in Miami in 2002. Serena has won the last five consecutive matches in their sibling rivalry.
Serena will meet the winner between Jelena Jankovic and Stefanie Voegele in Sunday's final where the 31-year-old Serena will be trying for her second straight Charleston crown and third overall.
The sisters, who grew up in the crime-ridden, drug-plagued streets of south Los Angeles, have played some competitive matches over the years but this certainly wasn't one of them.
Serena won the opening set in just 22 minutes and clinched the match when Venus lobbed a return of serve high and well past the baseline.
The top-seeded Serena enters Sunday's final riding a 10-match winning streak and shooting for her third title of the year.
She won in Miami last week and also captured the season-opener in Brisbane, Australia.