Vietnam's number one chess player Le Quang Liem suffered a second defeat to Chinese player Li Chao at Tata Steel Chess Tournament 2011 in Wijk aan Zee, the Netherlands on Wednesday.
Liem, ranked 79th, has been suffering a cold for two days because of the frigid, Northern European weather.
He has attributed his illness to the loss on Tuesday, to the host player Wouter Spoelman.
Spoleman, for his part was knocked out of the world's top 100 following a loss to Li Chao, ranked 101 st with Elo 2649.
Liem, the only Vietnamese player to enter the world top 100, has fallen near the bottom of Group B after a tie with 64th-ranked Filipino So Wesley, on Sunday.
He followed that match by tying, again, with 34th-ranked David Navara from the Czech Republic.
The 73rd Tata Steel Chess Tournament began on 14th and will end on 30th this month.