MIAMI, March 28 (DPA): Runaway ATP leader Novak Djokovic polished his win-loss record this season to 20-0 as he crushed American James Blake 6-2, 6-0 to advance to the fourth round of the Miami Masters.
The second-seeded Serb barely needed an hour on Sunday to mow down Blake, a fading force at age 31 who once stood inside the top five.
Djokovic has not lost a match since November and has won his past 21 on the trot dating to the Davis Cup final in December.
Spain�s sixth-seeded David Ferrer stopped the progress of Indian Somdev Devvarman 6-4, 6-2 while South African Kevin Anderson beat Spain�s Pablo Andujar 6-2, 6-3. The comeback of unseeded Argentine Juan Del Potro gained pace with the South American former US Open champion upsetting fourth seed Robin Soderling 6-3, 6-2.
�I played a really good match,� said the winner who missed much of 2010 after a wrist operation. �I served much better than before. This is what I need if I want to beat top 10 players.�
Wimbledon marathon man John Isner ended the dream for American journeyman Alex Bogomolov with a 6-2, 7-6 (7-4) result. Bogolomov had made a mark 48 hours earlier by beating Andy Roddick, the second unknown American to defeat the Scot in as many events.
Compatriot Mardy Fish, seeded 14th and without a result to boast of in Miami, beat Richard Gasquet of France 6-4, 6-3.
Fish is now the highest-ranked home player left in contention after holder Andy Roddick was upset in his opening match and was set to drop from the top 10 next week.
On the women�s side, Kim Clisters and Vera Zvonareva led a sweep of women�s seeds into the fourth round with number two Clijsters recovering for a defeat of Spain�s Maria Martinez Sanchez 4-6, 6-4, 6-3.
The third-seeded Zvonareva, losing finalist at Wimbledon and the US Open, beat Australian Jarmila Groth 7-6, (7-4), 6-2.
There were also third-round wins for French Open champion Francesca Schiavone, the number five, who beat Spain�s Llourdes Dominguez Lino 6-4, 7-6 (7-2) and number nine Agnieszka Radwanska as the Pole put out Maria Kirilenko of Russia 7-6 (7-2), 6-3.
Victoria Azarenka, seeed eighth, needed to fight back to get past Slovak Domenika Cibulkova 3-6, 6-3, 6-4.
The 15th-seeded Frenchwoman Marion Bartoli, losing finalist a week ago in the Indian Wells final, accounted for Ekaterina Makarova with the loss of just two games.
Clijsters is making a solid recovery from a shoulder injury that forced the Australian Open champion to quit a match last week in California and rest.
The mother of one is to next face another former number one player in Ana Ivanovic after the Serb beat Virginie Razzano 2-6, 6-2, 3-0 when the French player retired with a left thigh injury.
Clijsters has won all four of their previous meetings, the most recent at the US Open last autumn.
