![Juan Martin Del Potro of Argentina argues a line call on a serve by Roger Federer of Switzerland with chair umpire Mohamed Lahyani after electronic line review was not available during their Juan Martin Del Potro of Argentina argues a line call on a serve by Roger Federer of Switzerland with chair umpire Mohamed Lahyani after electronic line review was not available during their](https://c8.alamy.com/comp/2CYPXBF/juan-martin-del-potro-of-argentina-argues-a-line-call-on-a-serve-by-roger-federer-of-switzerland-with-chair-umpire-mohamed-lahyani-after-electronic-line-review-was-not-available-during-their-quarter-final-match-at-the-indian-wells-atp-tennis-tournament-in-indian-wells-california-march-16-2012-reutersdanny-moloshok-united-states-tags-sport-tennis-2CYPXBF.jpg)
Juan Martin Del Potro of Argentina argues a line call on a serve by Roger Federer of Switzerland with chair umpire Mohamed Lahyani after electronic line review was not available during their
![Roger Federer of Switzerland returns a forehand to Juan Martin Del Potro of Argentina during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16, Roger Federer of Switzerland returns a forehand to Juan Martin Del Potro of Argentina during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16,](https://c8.alamy.com/comp/2CXDW4P/roger-federer-of-switzerland-returns-a-forehand-to-juan-martin-del-potro-of-argentina-during-their-mens-quarter-final-match-at-the-indian-wells-atp-tennis-tournament-in-indian-wells-california-march-16-2012-reuters-mike-blake-united-states-tags-sport-tennis-2CXDW4P.jpg)
Roger Federer of Switzerland returns a forehand to Juan Martin Del Potro of Argentina during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16,
![Roger Federer: Juan Martin del Potro went on big rant after losing Indian Wells clash | Tennis | Sport | Express.co.uk Roger Federer: Juan Martin del Potro went on big rant after losing Indian Wells clash | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/Roger-Federer-Juan-Martin-del-Potro-933645.jpg)
Roger Federer: Juan Martin del Potro went on big rant after losing Indian Wells clash | Tennis | Sport | Express.co.uk
![Juan Martin Del Potro of Argentina serves to Roger Federer of Switzerland during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16, 2012. REUTERS/Mike Juan Martin Del Potro of Argentina serves to Roger Federer of Switzerland during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16, 2012. REUTERS/Mike](https://c8.alamy.com/comp/2D08Y89/juan-martin-del-potro-of-argentina-serves-to-roger-federer-of-switzerland-during-their-mens-quarter-final-match-at-the-indian-wells-atp-tennis-tournament-in-indian-wells-california-march-16-2012-reutersmike-blake-united-states-tags-sport-tennis-2D08Y89.jpg)
Juan Martin Del Potro of Argentina serves to Roger Federer of Switzerland during their men's quarter-final match at the Indian Wells ATP tennis tournament in Indian Wells, California March 16, 2012. REUTERS/Mike
![Roger Federer: Latest Results Prove It's Time to Lay off the Swiss Maestro | News, Scores, Highlights, Stats, and Rumors | Bleacher Report Roger Federer: Latest Results Prove It's Time to Lay off the Swiss Maestro | News, Scores, Highlights, Stats, and Rumors | Bleacher Report](https://img.bleacherreport.net/img/images/photos/001/617/276/141508394_crop_north.jpg?1332060929&w=3072&h=2048)