08/07/2012 04:16 EDT | Updated 10/07/2012 05:12 EDT

400 champ Richards-Ross edges 100 champ Fraser-Pryce in semifinals of 200; VCB, Felix advance

LONDON - Sanya Richards-Ross of the United States outleaned Shelly-Ann Fraser-Pryce of Jamaica to win their 200-meter semifinal heat in 22.30 seconds on Tuesday night, setting up a showdown for the title between two women who both already are bringing home gold from these Olympics.

The final is Wednesday, and there will be quite a field lining up alongside 400 champion Richards-Ross and 100 champion Fraser-Pryce, who ran her semifinal in 22.34.

Two-time defending 200 champion Veronica Campbell-Brown of Jamaica, and two-time runner-up Allyson Felix of the U.S. won their semifinals. Also advancing: 100 silver medallist Carmelita Jeter of the U.S.

Campbell-Brown took Heat 1 in 22.32 seconds, with Jeter 0.07 behind.

Felix, who owns three world titles in the 200, won Heat 2 in 22.31.