However, most recently, he got the better of the Spaniard in Rome only a few weeks ago. "I was always playing aggressive and hitting the ball when I had a chance". I am not playing anywhere close to my best and I know that.
Wawrinka said: "I think he's probably a bit less confident. It was just today it was just unusual how it came about".
Murray dropped the opening game of the fourth set on his serve and then swept Nishikori aside, beating the Japanese player for the ninth time in 11 career meetings.
Dabrowski, who is from Canada, and her Indian partner rallied to beat Anna-Lena Groenefeld of Germany and Robert Farah of Colombia 2-6, 6-2, 12-10.
The sixth-seeded Liu, who is aged 17, beat Marta Paigina of Russia 6-2, 6-0, while 15-year-old Osuigwe, who is seeded seventh, defeated 11th-seeded Russian Elena Rybakina 6-4, 6-4.
"It looked in the third set like he just didn't want to be out there, couldn't compete any more, and that's shocking for a guy that's won as much as he has and prides himself on competition".
The other semifinal match will pit top-ranked Andy Murray against 2015 champion Stan Wawrinka. He dropped a set in his first two matches against Andrey Kuznetsov and Martin Klizan, but finished off strongly in both matches.
The Strawberry Moon, a Smaller and Less Bright Full Moon
This month's full moon, also known as strawberry moon , is unique, since it's the smallest full moon of the year. It is called Green Corn Moon, the Planting Moon or the Birth Moon, all because of its link to crops and farming.
Ostapenko converted her second match point with a forehand attack, her 50th victor of the match.
The third seeded Romanian will face Czech Karolina Pliskova in the last four.
She only needed one, winning with a crosscourt forehand victor.
Halep, however, went on to win five consecutive games before saving a match point to take it to a decider, where she coasted to victory.
Murray won the first set 7-6 (6). She fended off another set point in the next game but a forehand error handed Halep the set.
It is the first time Djokovic has lost a set to love at a Grand Slam since the 2005 US Open.
The Austrian will now play Spain's Rafael Nadal in the last four of the clay court Grand Slam.
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The tournament's third seed was on the brink of elimination after finding herself 5-1 down in the second.
None of the women left at the French Open have won a Grand Slam title, while Garcia and Svitolina have never before reached the semifinals of a major. Having parted company with his coaching team last month, Djokovic was advised by Andre Agassi at the French Open.
World number two Djokovic slumped to a stunning 7-6 (7/5), 6-3, 6-0 quarter-final loss to Dominic Thiem for his earliest exit in Paris in seven years.
The topsy-turvy nature of an enthralling first set continued as Thiem this time broke straight back and, after staving off two set points in game 10, a tie-break was required.
Prediction: Thiem will get a French Open title - just not quite yet.
Stan Wawrinka has won the second set against top-ranked Andy Murray to level the French Open semifinals. "I was not in a position to play well the way I wanted to", said Nadal referring to Thiem's 6-4 6-3 quarter-final win at last month's Italian Open.
Pablo Carreno Busta came out of the starting blocks strong, bashing a powerful forehand down the line that Nadal couldn't reach.
Real Madrid reject Premier League bid for James Rodriguez
Despite this Wenger has made his first signing with Sead Kolasinac agreeing to join the club from Schalke on July 1. Indeed, it is suggested that Arsenal have made an official bid to try and lure Rodriguez to the Emirates.
Nadal was on the court only 51 minutes when his opponent, Pablo Carreno Busta, retired with an abdominal injury.