The Everton centre-back scored his second goal in five Premier League appearances in the 89th minute, just when Bolton appeared on course for a deserved draw.
Nicolas Anelka, who signed a new four-year contract this week, volleyed home a 55th-minute equaliser after Ayegbeni Yakubu had scored a debut goal in the 11th minute following his £11.25million move from Middlesbrough on Wednesday.
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