Roger Federer returns a shot during his fourth-round match against Jeremy Chardy at Indian Wells. Jayne Kamin-Oncea / USA Today
Roger Federer returns a shot during his fourth-round match against Jeremy Chardy at Indian Wells. Jayne Kamin-Oncea / USA Today
Roger Federer and Juan Martin del Potro advance at Indian Wells
Philipp Kohlschreiber, Kevin Anderson, Borna Coric and Sam Querry also advance to the quarter-finals
