Complex sentence: In 1977, Barker won two singles titles in San Francisco and Dallas and beat Martina Navratilova to reach the Virginia Slims Tour Championships final, where she lost in three sets to Chris Evert.
Split into simpler sentences: In 1977, Barker won two singles titles in San Francisco and Dallas. She beat Martina Navratilova to reach the Virginia Slims Tour Championships final, where she lost in three sets to Chris Evert.