Is the Serb working on a new trick shot to rival Federer's SABR?
The 26-year-old dazzled on defense during her straight-sets win over Dominika Cibulkova on Saturday in Tokyo.
In an interview with the New York Times, Dave Haggery expresses his desire to tweak the Davis Cup format.
“I didn’t have the best result at this tournament last year and that is definitely something I would like to change this week," said world No. 3.
The Belarussian is into her first career semifinal after downing third-seeded Stephens.
World No. 3 joins Ekaterina Makarova, Anastasia Pavlyuchenkova and Elena Vesnina for November final vs. Czech Republic.
World No. 19 to work with Davin, Juan Martin del Potro's former coach, during Asian swing.