The first women's semifinal between top-ranked Simona Halep and third-seeded Garbine Muguruza will start at 3 p.m.as planned.
Losing the first set was a moment of unwanted history for the veteran as it was the first he'd dropped at Roland Garros since 2015, having won his last 37 successive sets in the French Open. In a match that had several tie-breaks written all over it, the pair were duking it out in a ... tie-break, with the score locked at 5-5 when they were forced off court.
Schwartzman also missed three break points before his brief revival was ended when Nadal took his fourth match point to win in three hours and 36 minutes.
The players briefly returned to the court, giving the 32-year-old Spaniard enough time to reel off three straight games, but the rains came again for a second and final time when he was serving for the set.More news: OECD pegs India's GDP growth at 7.4pc this fiscal
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Novak Djokovic's shock exit at Roland Garros opened up the tournament bracket, although there will be a wait to see who out of Rafael Nadal and Diego Schwartzman will move into the semi final after their match was postponed until 12.00PM CET on Thursday.
Schwartzman, who had never even reached a Grand Slam quarter-final until last year's US Open, broke first in the second set as Nadal uncharacteristically blew a 40-15 lead, capped by two wild forehands. It will be followed by the all-American matchup between Madison Keys and Sloane Stephens.
Schwartzman, the shortest player remaining in the men's draw, continued to thrill the Paris crowds with his tenacity and ball striking but was unable to take advantage of three break opportunities as an energised Nadal eventually served out for victory.
"But today was certainly not one of those steps".