Serena Williams remains on course to win a 22nd Grand Slam title after beating Kiki Bertens to set up a French Open final against Garbine Muguruza.
The American top seed was well below her best, but beat unseeded Dutch player Bertens 7-6 (9-7) 6-4.
Spanish fourth seed Muguruza impressed in a 6-2 6-4 win over former finalist Sam Stosur of Australia.
Both matches were watched by sparse crowds on another cold, grey day as Paris suffers severe flooding.
Williams, 34, is aiming to tie Germany's Steffi Graf on 22 major singles titles, which would put her two behind all-time leader Margaret Court of Australia.