World Number One Novak Djokovic has stormed into the quarterfinals of the Qatar Open Tennis Championship. Continuing his winning streak in Doha, Djokovic brushed aside the challenge of Sergiy Stakhovsky 6-2, 6-1 in just 61 minutes. He will be up against the seventh seed Ivo Karlovic for a place in the semi-finals.In the other match, fourth seeded Spaniard David Ferrer sent fellow countryman Fernando Verdasco packing 6-3, 6-2. Ferrer will square off with Dustin Brown in the quarter-finals today. Djokovic and Ferrer are heading for a semifinal clash after the round of last eight.