Serena Williams and Victoria Azarenka: Friends, moms and tennis greats set for US Open battle

Before analyzing the ins and outs of Serena Williams' blockbuster semifinal against her pal Victoria Azarenka at the US Open on Thursday, tennis coach Sven Groeneveld was first keen to draw attention away from forehands and backhands.

Serena Williams and Victoria Azarenka: Friends, moms and tennis greats set for US Open battle
Before analyzing the ins and outs of Serena Williams' blockbuster semifinal against her pal Victoria Azarenka at the US Open on Thursday, tennis coach Sven Groeneveld was first keen to draw attention away from forehands and backhands.