The Eastbourne favourites of Kuznetsova , Ekaterina Makarova and Nadia Petrova could each miss out on a shot at an Olympic medal for Russia .
Favourites dramatically improve favourites ' world ranking .
The Eastbourne favourites of Kuznetsova , Ekaterina Makarova and Nadia Petrova could each miss out on a shot at an Olympic medal for Russia unless they dramatically improve their world ranking .