FC Porto had a red hot start in the icy Russian temperatures, taking a second-minute lead through Ricardo Quaresma.

Argentinian Lucho Gonzalez then hit a superb second-half goal for the Portuguese visitors, who moved top of the group ahead of Arsenal's match against SV Hamburg at Highbury.

CSKA's recent league title victory celebrations were tempered by the news that their coach Valery Gazzaev's younger brother Ruslan had been killed in a car crash on Saturday.

On Tuesday, Gazzaev could only watch as his side succumbed to a conspicuously superior side who pushed them into second place in the group.

In their final group game against SV Hamburg in a fortnight the Russians could be forced into battling to stay in the competition, but they will do so without Brazilian striker Vagner Love.

Love was booked in the second half. Influential Bosnian midfielder Elvir Rahimic will also miss that match after picking up a yellow card.

Porto's early lead hit CSKA hard, but was merely a sign of things to come.

After just two minutes Helder Postiga found Lisandro Lopez down the right and he produced a superb pass across the penalty area which the Porto striker met with a shot that found the far corner of Igor Akinfeev's net.

It was Quaresma's first ever goal in his 19th Champions League appearances.

Porto were on fire despite the icy conditions.

First Postiga forced Akinfeev into turning the ball round the post and from the resulting corner Pepe should have scored as the ball evaded all the defenders but free at the far post he volleyed over the bar.

CSKA won their third league title inside four years on Saturday, however in this match they were sorely lacking any kind of winning instinct, and Porto proved all too dangerous on the counter attack.

In the second half CSKA's fortunes dipped again when Love was booked shortly after the restart, assuring he would miss CSKA's next, potentially crucial fixture against Hamburg.

And on the hour mark the Russians were stunned again when Porto skipper Lucho Gonzalez finished off a superb offensive action by firing past Afinkeev to give Porto a deserved 2-0 lead.

The ball was played in high from the right of Akinfeev's goal and Lisandro Lopez headed the ball down towards Lucho Gonzalez who was unmarked on the edge of the area.

The Argentinian coolly hit a swerving first-time shot past the diving keeper to claim his third goal of this season's competition.

Porto almost struck a third in the 69th minute when Lucho Gonzalez set up Postiga with a deft pass to the right of the six-yard box, but the striker's close-range blast was blocked by the keeper.

CSKA had little to offer in reply, and in the 73rd minute they had another reason to think about their final group game when Rahimic was booked for a foul on Bruno Alves.

In the dying minutes Love gave the hosts a glint of hope, but after fighting his way through a crowd of Porto defenders the Brazilian's lofted shot bobbled as he made contact and sailed well wide of Helton's right hand post.