Two-time champions Lokomotiv Moscow joined Zenit St Petersburg at the top of the Russian Premier League table following a hard-fought 1-0 win in the Moscow derby with Dynamo on Sunday.
The winning goal by Senegal forward Dame N'Doye allowed Lokomotiv to draw level at the top on 36 points from 17 matches, with two more Msocow clubs, CSKA and Spartak, three points further back.
Lokomotiv, who beat Dynamo 3-1 earlier in the season, started in a lively style but failed to find the net before the break.
After the interval Dynamo moved up a gear and created a series of scoring chances but also to no avail.
N'Doye netted the winner in the 65th minute with a low shot from just inside the area.
Dynamo poured forward seeking an equaliser but failed to save the day.
Meanwhile, Anzhi Makhachkala failed again to chalk up their first win of the season as they were held to a 0-0 draw by visitors Volga Nizhny Novgorod.
In Sunday's other match, Ural Yekaterinburg and Samara drew 1-1.
Ural defender Denis Tumasyan opened the scoring in the 39th minute but Paraguayan forward Luis Caballero saved the day for the visitors with less than a minute to go.