Gwen Stefani and son
Kingston were in fan mode as they watched
Roger Federer of Switzerland play
Juan Martin Del Potro during the BNP Paribas Open at the Indian Wells Tennis Garden on Friday (March 16).
The pair were joined by
Mary Jo Fernandez and
Mirka Federer as they watched Federer ease into the semifinals with a 6-3, 6-2 victory over del Potro, the Swiss star's fourth victory over the Argentine this year.
Meanwhile, Gwen recently ...