A late goal by substitute Winston Parks gave Lokomotiv Moscow a 3-2 win over Dynamo Kiev in their Champions League match in Moscow tonight to throw Group B wide open.
The Ukrainian champions twice came from a goal down to level the score before Lokomotiv's Costa Rican striker, who came on just minutes before, fired the Russians ahead after 89 minutes.
The win put the Russians top of the group with eight points, one ahead of Inter Milan, who host Arsenal later tonight, with Dynamo in third place, two points behind the leaders.
Arsenal are bottom of the standings with four points.
Maxim Buznikin had opened the scoring for Lokomotiv with a low drive into the far corner in the 28th minute before Dynamo captain Valentin Belkevich equalised nine minutes later.
Sergei Ignashevich put Lokomotiv back in front from the penalty spot on the stroke of halftime but Maxim Shatskikh levelled once again midway through the second half.