Armenian Grandmaster Levon Aronyan suffered a defeat against Ukrainian Vassily Ivanchuk in his 4th-round match at the Chess Masters Final 2011, being held in Sao Paulo, Brazil. World champion Viswanathan Anand, on the other hand, defeated Spain’s Francisco Vallejo and, garnering 5 points, drew level with Aronyan. The current leader is still Ivanchuk with 10 points.