(Photo taken from the official site)
Topalov and Aronian lead with 3 out of 4.
Results of the 4th round
GM Grischuk, A. (1) 2771 ½-½ GM Topalov, V. (2½) 2816
GM Giri, Anish (2) 2793 ½-½ GM Carlsen, M. (2) 2853
GM So, Wesley (1½) 2779 0-1 GM Aronian, L. (2) 2765
GM Vachier-Lagr. (1½) 2731 ½-½ GM Nakamura, H. (1½) 2814
GM Caruana, F. (½) 2808 ½-½ GM Anand, V. (½) 2816
Standings after 4 rounds
1 Topalov, Veselin 3/4 2816
2 Aronian, Levon 3/4 2765
3 Carlsen, Magnus 2½/4 2853
4 Giri, Anish 2½/4 2793
5 Vachier-Lagrave, Maxime 2/4 2731
6 Nakamura, Hikaru 2/4 2814
7 So, Wesley 1½/4 2779
8 Grischuk, Alexander 1½/4 2771
9 Anand, Viswanathan 1/4 2816
10 Caruana, Fabiano 1/4 2808
View games here.