The Mutua Madrid Open in Spain celebrates its 10th anniversary this May. The ATP World Tour Masters 1000 tournament is annually held in Madrid on clay surface. Meanwhile, Novak Djokovic, the 2 seed, also has reason to celebrate: he has tied the 29-0 record of Ivan Lendl in 1986 for the third best start to a season. The top two are Bjorn Borg (33 in 1980) and John McEnroe (42 in 1984). Djokovic will play against 6 seed David Ferrer tomorrow in an attempt to pass Lendl and earn a trip to the semifinals. The 1 and 3 seeds, Rafael Nadal and Roger Federer, have also cruised their way to the quarterfinals in the tournament. 4 seed Andy Murray was upset in the third round of the tournament, losing in straight sets to unseeded Thomaz Bellucci.