- Novak Djokovic loses 7-6 (2), 6-3 to Janko Tipsarevic in Madrid
- Djokovic says he will not play in Madrid again while the clay is blue
- Nadal said he would also boycott the event after his loss a day earlier
- Roger Federer, Serena Williams and Victoria Azarenka all through to semifinals
A day after Rafael Nadal exited the Madrid Masters and vowed never to return while the clay is still blue, a similarly disgruntled Novak Djokovic suffered a shock 7-6 (2), 6-3 loss to fellow Serb Janko Tipsarevic.
The world No. 1 said he would join Nadal in boycotting the Madrid tournament next year if organizers did not restore standard red clay to the courts.
"I want to forget this week as soon as possible and move on to the real clay courts," Djokovic said. "It took me at least a week to try to get used to this surface and somehow find a way to win matches and play a decent level of tennis.
"There is no discussion in my eyes, it's very simple. No blue clay for me."
Nadal lost to fellow Spaniard Fernando Verdasco on Thursday for his earliest exit in a clay-court tournament in eight years. Verdasco was routed 6-1, 6-2 by Tomas Berdych in Friday's quarterfinals.
The blue clay is the brainchild of tournament owner Ion Tiriac, who claims it helps fans see the ball and creates a better viewing experience.
And while Djokovic and Nadal have crashed out, Roger Federer has thrived at the tournament, beating David Ferrer 6-4, 6-4 on Friday to advance to the semifinals.
The 16-time Grand Slam champion, president of the ATP Players' Council, said he sympathized with Nadal and Djokovic.