Halep set up a quarter-final clash with Elina Svitolina, who clawed her way back from 5-2 30-0 down in the third set to defeat Croatian qualifier Petra Martic 4-6 6-3 7-5.
Nishikori has won just two of 10 matches against Murray, but can't remember beating the British player at the U.S. Open a year ago. In the other semifinal, nine-time champion and No. 4 seed Rafael Nadal faces No. 6 Dominic Thiem, the 23-year-old Austrian who dispatched Djokovic in straight sets.
"He's playing well, I'll need to take it to him and play some good tennis if I'm to win".
Swiss third seed Wawrinka, the 2015 title victor, has not lost a set on his way to a third successive semi-final in Paris.
Nishikori advances to the quarterfinals of a Grand Slam for the seventh time in his career, the most Grand Slam quarterfinal appearances for any Japanese man. Play was suspended on Tuesday just before 3.30 pm local time (7pm IST) during the first two women's quarterfinals at Roland Garros.
Wawrinka, 32, is now the oldest semifinalist at Roland-Garros since Jimmy Connors in 1985.More news: Trinidad & Tobago to close schools, offices ahead of storm
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Do you something awesome to share with the world? He plays well on the clay.
He will face Kei Nishikori after the eighth seed beat Fernando Verdasco to reach the last eight.
"Obviously he's played fantastically at this tournament so far". "He [Nishikori] was dictating all of the points in the first set". It's not always about how well that you play or, you know, the level that you play at.
Rohan Bopanna has bagged his first-ever Major win after bagging the French Open 2017 crown.
"It's never easy and I think this week he's been playing well, I've been watching some matches". Corretja worked with Murray between 2009 and 2011 centrally on his clay court game and believes his former protégé has timed his run of form perfectly.
"After that, I felt a little more free, sets two and three were really good". On the bottom half, No. 2 Djokovic, the defending champion, and No. 4 Nadal, seeking a record-extending 10th title in Paris, would set up a showdown in the semifinals with one victory apiece today.