Nairobi: Beijing silver medallist Catherine Ndereba of Kenya has vowed to become the oldest Olympic marathon winner at the 2012 London Games.
The 37-year-old, who also won silver in Athens in 2004, is bidding for a 10th career marathon victory in Yokohama on Sunday.
Romania`s Olympic champion Constantina Dita, who set the record for being the oldest marathon gold medallist at 38 in China last year, is also scheduled to run.
"Winning in London is my biggest target," double world champion Ndereba told Thursday`s Japanese media.
"A 10th race victory here would be a nice milestone," added Ndereba, who will be 40 at the 2012 Olympics. "But everything is geared towards London."