China's Wu Minxia, chasing a record-tying sixth medal, qualified No. 1 Saturday in the semifinal of the women's 3-meter springboard.
Wu won the synchronized springboard competition with He Zi and has five career Olympic medals, one short of tying countrywoman Guo Jingjing for the most ever among female divers.
She had 394.40 points Saturday to lead 12 divers who qualified for Sunday's final.
Italy's Tania Cagnotto was second and He qualified third. Canada's Jennifer Abel was fourth, followed by Americans Cassidy Krug and Christina Loukas. Another Canadian, Emilie Heymans, qualified eighth.
China has won all four diving events so far in London after going 7-for-8 in Beijing four years ago.