Roger Federer stormed his way into his 11th semi-final at the BNP Paribas Open with a dominant win over Hyeon Chung.
The pair faced a re-match of their Australian Open semi-final – in which Chung had retired through injury – but the South Korean failed to improve his record against the world No.1.
Federer, 36, toppled his 21-year-old opponent 7-5, 6-1 after an hour and 23 minutes on court.
The match was more competitive than their meeting in Melbourne, however, with Chung rallying to come back from 3-0 down in the opening set to tie the scores.
But a focused Federer held his nerve, eventually breaking for another time to take the set.
The Swiss once again raced to a 3-0 lead in the second, and this time his opponent had no answers.
Federer's win ensures he will remain in the world rankings top spot for another two weeks, extending his record reign to 308 weeks.
He will now face another 21-year-old in the final four at Indian Wells – Borna Coric.
The Croat came back from a break down in the third set to beat South Africa's Kevin Anderson 2-6, 6-4, 7-6 (7/3).
In the women's singles, Venus Williams secured her spot in the semi-finals in Indian Wells for the first time since 2001.
The 37-year-old continued her run of fine form with a swift dismissal of Carla Suarez Navarro in the quarter-finals, winning 6-3, 6-2 in a little over an hour.
Maria Sharapova, meanwhile, has withdrawn from next week's Miami Open because of a left forearm injury.
It has been a troubled season so far for the former world No.1, who has not won a match since the Australian Open having lost in the opening round in Doha and last week in Indian Wells.
After that defeat by Naomi Osaka, she parted ways with coach Sven Groeneveld, who had stuck with her through her 15-month doping ban, while she pulled out of last month's tournament in Dubai, also with a forearm problem.
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