Indian Grandmaster Pentala Harikrishna held world No. 1 and world champion Magnus Carlsen in the fourth round of the preliminary stage of the Champions Chess Tour Airthings Masters online chess championship.

Both Harikrishna and Carlsen drew all their four games on the opening day. The game between Harikrishna and the Norwegian ended in 24 moves after the players repeated the moves.

Former world champion Viswanathan Anand had earlier drawn his games with Maxim Vachier-Lagrave, Daniil Dubov and Spaniard David Anton Guijjaro. He is in eighth place with two points.

Harikrishna will take on Dutch GM Anish Giri in the fifth round followed by games against Alexander Grischuk, Hikaru Nakamura, Ian Nepomniachtchi, Lev Aronian, Wesley So and Teimour Radjabov subsequently.

Carlsen was held to draws by Aronian, So and Radjabov also. Nakamura, Aronian, Dubov, Radjabov and So are in the lead with 2.5 points.