\n<\/p>\n
Swiatek has reached the last four in each of her past three appearances at the event in California and will take on Ukrainian Marta Kostyuk on Friday.<\/p>\n
Kostyuk, the 31st seed, secured a first WTA 1,000 semi-final appearance with a 6-0 7-5 win over Russian 28th seed Anastasia Potapova.<\/p>\n
Wozniacki, 33, was enjoying her deepest run at a tournament since returning to the circuit last season having come out of retirement after giving birth to her two children.<\/p>\n
“Huge respect for her, and I’m sad that we had to finish that way,” Swiatek, 22, said after the match.<\/p>\n
US Open champion Gauff, 20, trailed 3-1 in the second set and was down a break point but she rallied to reach the semi-finals at Indian Wells for the first time, becoming the youngest American since Serena Williams in 2001 to reach the tournament’s last four.<\/p>\n
“I’m really happy to be through today’s match,” Gauff said.<\/p>\n
“It wasn’t the best style of the serving, but overall I think when it comes to the groundstroke game and returns, everything else, honestly, I played well. I just try and take the positives into the next match.”<\/p>\n
Sakkari, 28, is next up for Gauff after the Greek ninth seed beat American Emma Navarro 5-7 6-2 6-4 to reach the semi-finals for a third consecutive year.<\/p>\n<\/div>\n