Anton Korobov is the only Grandmaster who started off with a perfect 5-0-0 at the World Rapid Championship in Doha, Qatar. He is currently at the top of the standings before Round 6. Next in line, is Levon Aronian who is very close behind on 4.5/5.
Magnus Carlsen has a had a setback of 1.5 points due to a bad start and is currently at position no. 20 with 3.5/5.