Hikaru Nakamura plays a six game classical followed by a four game rapid match in Saint Louis against Ruslan Ponomariov. The idea is to start to get some match experience. Alongside Ben Finegold plays Ray Robson (who replaced Viktor Korchnoi who developed some mild health problems after a tournament in Spain and can't travel).
http://www.chess.co.uk/twic/chessnews/events/nakamura-against-ponomariov-match-2011
http://www.chess.co.uk/twic/chessnews/events/nakamura-against-ponomariov-match-2011