Radwanska completed the women's semifinal lineup and will next play Angelique Kerber.
Her match was switched to a different court following a delay of about 90 minutes at 4-4 in the third set. The match was the fifth of the day to wrap up on Centre Court, with the other three women's quarterfinals played there in their entirety.
The 17th-seeded Kirilenko was trying to reach her first Wimbledon semifinal. She was supported in her guest box by two-time NHL MVP Alex Ovechkin of the Washington Capitals.
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