World no. 3 Roger Federer of Switzerland eased into the final after defeating Janko Tipsarevic 6-2, 6-3 of Serbia.
Topseed and defending champion Rafael Nadal of Spain won over fifth seed Janko Tipsarevic of Serbia in straight sets 6-2, 6-2 at Barcelona Open.
World no. 1 Novak Djokovic will play against British no. 1 Andy Murray at the Dubai Championship semi finals.
David Ferrer of Spain dominated Novak Djokovic in straight sets 6-3, 6-1 at the ATP World Tour Finals.
World number one Novak Djokovic had been leading 7-6 6-7 6-0 3-0 when his Serbian Davis Cup team mate Janko Tipsarevic, retired with a leg injury after three hours, 27 minutes of play at Arthur Ashe Stadium after feeling sharp pain in his left leg.
Top seed Novak Djokovic, opened his fourth-round match with a thrilling 16-14 first-set tiebreaker win over No. 22 seed, Alexandr Dolgopolov. Things got easier from there in a 7-6 (14), 6-4, 6-2 victory.
World no. 1 tennis player Novak Djokovic advances to the finals after Jo-Wilfried Tsonga quits trailing 6-4 , 3-0 during semifinal play at the Rogers Cup tennis tournament on Saturday due to a right arm injury.
World no. 1 tennis player, Novak Djokovic has extended his season record to a spectacular 51-1 after defeating Frenchman Gael Monfils 6-2 6-1 at the Rogers Cup tennis tournament in Montreal.