Daniil Medvedev's sore right ankle wasn't a factor Wednesday as he beat Alejandro Davidovich Fokina 6-3, 7-5 to reach the semi-finals at Indian Wells, where Aryna Sabalenka and Frances Tiafoe raced into the final four.Medvedev showed little ill effect from the twisted ankle he suffered in a three-set battle against Alexander Zverev a day earlier as he pushed his ATP match winning streak to 18 straight.He booked a semi-final clash with 16th-ranked American Tiafoe, who beat 2021 Indian Wells winner Cameron Norrie 6-4, 6-4.Australian Open champion Sabalenka, still building on her maiden Grand Slam title in Melbourne, overpowered Coco Gauff 6-4, 6-0 to advance at the combined WTA and ATP Masters 1000 event.Sabalenka will face 2022 runner-up Maria Sakkari after the seventh-ranked Greek defeated two-time Wimbledon champion Petra Kvitova 4-6, 7-5, 6-1.Medvedev arrived in the California desert riding high after nabbing titles at Rotterdam, Doha and Dubai in three weeks.Long a critic of the slow hard courts of the Indian Wells Tennis Garden, he was through to the quarters for the first time after hanging on to beat Zverev despite rolling his ankle."I'm actually happy the ankle didn't hurt much because when I warmed up it was hurting pretty bad," Medvedev said. "I couldn't move well on the warmup."I tried to warm it up as long as possible and take one painkiller so that probably helped and I was actually feeling better and better during the match," added the former US Open champion, who has two days off before he takes on Tiafoe.He raced through the opening set, a break of the Spaniard's serve in the second game the only opening he needed as he lost just six points on his serve on the way to pocketing the set in 39 minutes.It was