Murray and Federer to face off at Indian Wells

Andy Murray will face Roger Federer in the semi-finals of the BNP Paribas Open at Indian Wells after the British number one came through a tough encounter with Ivan Ljubicic 7-5 7-6 (8/6).

Murray is yet to lose a set in this year's tournament after overcoming the 74th-ranked Ljubicic in a little more than two hours but will face a tricky test against Federer, who defeated Fernando Verdasco Spain 6-3 7-6 (7/5) to secure his place in the last four.

The British number one was made to toil by Ljubicic, the oldest man in the draw, who many thought would still be tired after coming through a gruelling three-hour epic with Igor Andreev the previous day.

Murray, who only had to play for 50 minutes before his fourth-round opponent Tommy Robredo retired with a wrist injury, made good on his promise to be more aggressive from the start, immediately breaking the 30-year-old in the opening game and looking sharp as he raced into a 2-0 lead.

However, Ljubicic began to show glimpses of the talent that had taken him to a career high of world number three, twice missing the chance to break back in the fourth before finally managing it in the sixth, Murray slicing a poor attempted drop-shot into the net to make it 3-3.

Ljubicic followed up by winning the next game to love and served his first ace in his next service game to take the score to 5-4.

But Murray replied with some unreturnable deliveries of his own to level at 5-5 and Ljubicic crumbled in the 11th, making a series of errors to hand his opponent a second break before the Scot held serve to take the first set 7-5.

The second set went with serve before coming to life in the ninth game. Ljubicic, serving at deuce, was unhappy when Murray called a shot in and saw the Hawk-Eye replay support his claim.

The Croat was sure the line judge had correctly called the shot out and became even angrier when the umpire admitted he agreed with him, but could not overrule the technology. The deflated Ljubicic subsequently conceded the game on the next point and Murray was left to serve for the match at 5-4.

But the Croat was not finished and broke back, with both players holding their serve in the next two games to take the match into a second set tie-break. Ljubicic remained resilient and Murray had to keep working hard, but he finally prevailed 8-6 for a 7-5 7-6 victory overall.

"I thought I did well," he told Sky Sports.

"At the end of each set, I started to make more returns. I served very well in the tie-break at the end; I didn't serve huge the whole time but didn't give any opportunities away on the second serve.

"I bounced back well each time I got broken, so I was happy with that."

Federer, meanwhile, maintained his pursuit of a 58th career title after taking one hour and 32 minutes to despatch of Verdasco.

The Swiss star claimed the first set when Verdasco double faulted in the ninth game and then stormed into a 4-1 lead in the second set.

However, Verdasco rallied and climbed into a 6-5 lead before Federer broke back to set up the tiebreaker, where he twice lost match points before finally serving for the win.

In the women's event, defending champion Ana Ivanovic reached the semi-finals without taking to the court after Sybille Bammer of Austria withdrew prior to the match with a shoulder injury.

Unseeded Anastasia Pavlyuchenkova also progressed to the last four with a 7-6 6-4 win over Agnieszka Radwanska, the seventh seed from Poland.

The contest featured 11 breaks of service as the Russian prevailed in one hour 35 minutes.

"I'm very excited now, and more and more every day because I keep winning," Pavlyuchenkova said. "And it's really big achievement for me this week. I beat some really good players."