(Photo taken from chess-news.ru)
Aronian is leading the event with 3 out of 4 after winning against Nakamura.
Results of the 4th round
Aronian 2 1-0 2 Nakamura
Giri 2 1/2 2 So
Dominguez 1 1-0 2 Caruana
Van Wely 1 1/2 2 Harikrishna
Karjakin 1.5 1-0 1.5 Rapport
Gelfand 0.5 1/2 0.5 Naiditsch
Standings after 4 rounds
1 Aronian, L. 3.0 / 4 2812
2 Harikrishna, P. 2.5 / 4 2706
3 Karjakin, S. 2.5 / 4 2759
4 So, W. 2.5 / 4 2719
5 Giri, A. 2.5 / 4 2734
6 Dominguez, L. 2.0 / 4 2754
7 Caruana, F. 2.0 / 4 2782
8 Nakamura, H. 2.0 / 4 2789
9 Van Wely, L. 1.5 / 4 2672
10 Rapport, R. 1.5 / 4 2691
11 Naiditsch, A. 1.0 / 4 2718
12 Gelfand, B. 1.0 / 4 2777