Paris Saint-Germain clinched a place in the last 16 of the UEFA Champions League after beating Dynamo Kyiv 2-0 in the Ukrainian capital.
Ezequiel Lavezzi struck in both halves to give PSG a fourth win from five matches in Group A and consign Dynamo to a spot in the UEFA Europa League.
The result moved PSG onto 12 points, with FC Porto on 13 after their 3-0 win over lowly Dinamo Zagreb in Portugal, leaving the two sides to duel it out for top spot when they meet at the Parc des Princes in a fortnight.
Alex spurned an excellent chance to give PSG the lead inside the opening ten minutes as he powered a header wide, but the Brazilian defender quickly redeemed himself at the other end with an excellent sliding block to deny Ideye Brown.
Oleh Gusev's long-range strike drew an unconvincing save out of Salvatore Sirigu, with Alex reacting quickly to clear the aftermath before Brown could pounce on the loose ball.
The Italian did considerably better to keep out Gusev's header moments later although Dynamo should have gone in front as Denys Garmash inexplicably fired wide from the rebound with the goal at his mercy.
A cleverly-worked free-kick saw Kyiv's Maxym Koval dive low to his right to save from Zlatan Ibrahimovic, while Miguel Veloso had Sirigu again sprawling across his line as his 25-yard set-piece drifted just wide.
Lavezzi comes to life
Ibrahimovic was a peripheral figure for much of the first half, but having assisted all four goals in PSG's 4-0 rout of Dinamo Zagreb last time out, there was no surprise as the talismanic Swede played an integral role in Lavezzi's first goal just before the break.
Lavezzi laid the ball off to Ibrahimovic before continuing his run as the latter slipped in a perfectly-weighted pass to the Argentinian, who lifted the ball over Koval with aplomb.
Lavezzi added to his tally seven minutes after the restart as Blaise Matuidi pounced on an under-hit backpass from Yevhen Khacheridi before squaring to the South American, who steered the ball into an unguarded net.
Sirigu then made a brilliant fingertip save to prevent Dudu from reducing the deficit after his shot looped up off the heel of Gregory van der Wiel, before holding well from Lukman Haruna.
Dudu also found the PSG shot-stopper in top form, while Artem Milevsky headed wide in added time as the the visitors put an end to their two-game winless run.