Aronian won against Vachier-Lagrave and now shares 1st-2nd places with Adams who drew Mamedyarov.
Standings after 4 rounds
Michael Adams 6 pt
Levon Aronian 6 pt
Maxime Vachier-Lagrave 5 pt
Shakhriar Mamedyarov 3 pt
Games of the round
Pairings of the 5th round
Shakhriyar Mamedyarov – Maxime Vachier-Lagrave
Michael Adams – Levon Aronian