Top seed Novak Djokovic, second seed Roger Federer, third seed Andy Murray and fourth seed Tomas Berdych have entered the last eight of ATP Tennis Championship in Dubai. Six-time winner Roger Federer blew away the challenge of Spain's Fernando Verdasco 6-4, 6-3 in a second round match. After trailing 4-1 in the first set, the Swiss maestro won 20 straight points to win the match in style. Federer plays Richard Gasquet in the Semifinals.World Number one, Novak Djokovic thrashed Andrey Golubev 6-1, 6-2 in one hour. Third seed Andy Murray outclassed Joao Sousa 6-0, 6-2 in even lesser time. Last year finalist and fourth seed Tomas Berdych was pushed to three sets by Italian Simone Bolelli 7-6, 5-7, 6-0. In other matches, Denis Istomin beat Sergiy Takhovsky 6-4, 3-6, 6-4, while Richard Gasquet defeated Roberto Baista Agut 6-4, 3-6, 6-4.In Doubles, Leander Paes and his partner Raven Klassen crashed out in the first round itself. They were shocked by Jamie Murray and Johan Peers 2-6, 6-4, 10-8 in a three setter. Paes and Klassen won the first set with ease. But Murray and Peers fought back to win the second set 6-4 and then in the tie breaker they held on to their nerves to emerge winners.