Five-time World Champion Viswanathan Anand on Tuesday suffered a defeat at the hands of Hikaru Nakamura of United States in the fourth round of London Chess Classic.
This was Anand's sixth loss against the American in Classical chess and the Indian ace will now have to do a lot of hard work to catch up in the last five rounds.
With five rounds still to come, Anand slipped to ninth spot in the ten-player round-robin event but is only a full point behind the leading pack.
Out of the 20 games played so far in the Classic, only three have ended decisively.
Anish Giri of Holland, Maxime Vachier-Lagrave of France and Nakamura share the top spot on 2.5 points each near the half way mark in this tournament.
World champion Magnus Carlsen's hunt for an elusive victory continued well into the fourth round as the Norwegian was held to a draw by Michael Adams of England.
Bulgarian Veselin Topalov missed out on an opportunity for his first victory when he let Fabiano Caruana of United States off the hook.
