(REUTERS) - World No. 1 Novak Djokovic rolled into the semi-finals of the Miami Open with a 6-3, 6-3 romp over Tomas Berdych on Wednesday as he continued his pursuit of a fifth title in six years on Key Biscayne.
Djokovic did not face the difficulty that he had in his fourth-round match, when he was forced to fend off 14 of 15 break points, while he also attacked Berdych's second serve to advance to a clash with Belgium's David Goffin after 99 minutes.
Goffin beat France's Gilles Simon 3-6, 6-2, 6-1.
Berdych was coming off a marathon win against Richard Gasquet on Tuesday and did not have enough left to challenge Djokovic. He won just six of his 23 second service points and was broken four times.
Djokovic improved to 26-1 this year. His only defeat came in February when he was forced to retire against Spain's Feliciano Lopez in Dubai due to an eye infection.
He has yet to drop a set in Miami, despite his issues with Austria's Dominic Thiem in the fourth round.
Meanwhile, Victoria Azarenka withstood some early pressure from Britain's Johanna Konta to continue her quest for a third Miami Open title with a 6-4, 6-2 quarter-final victory on Wednesday.
Azarenka, who 10 days ago beat Serena Williams to win the Indian Wells title in California, was too consistent for the 24th-seeded Konta in the end to keep alive her bid to capture the second half of the Sunshine Double.
She will now face second seed Angelique Kerber, who beat American Madison Keys 6-3, 6-2.
Konta, playing her first quarter-final of a WTA Premier event after making her first Grand Slam semi-final at the Australian Open in January, more than held her own in a first set played in blustery conditions.
Azarenka, however, rose to the occasion to fend off five break points, while Konta double-faulted twice to drop serve as the Belarusian took charge in just over 90 minutes.
Kerber, who won the Australian Open, lost the opening match of her two previous tournaments but was helped by 39 unforced errors by Keys, the last American remaining in either draw, who was not able to put much pressure on her German opponent.
The 28-year-old left hander upset Azarenka in the quarter-final at Melbourne Park then beat Konta in the last four and Serena in the final to claim her first Grand Slam title.