Barcelona's Raphinha scored deep into stoppage time to hand his side a dramatic 5-4 comeback win at Benfica to seal a place in the top of the Champions League table on Tuesday. This came after a hat trick from Vangelis Pavlidis gave the hosts a two-goal half-time lead.

The Catalans continued their recent poor La Liga form with a shaky start at the Estadio da Luz, while coach Hansi Flick's decision to start goalkeeper Wojciech Szczesny raised questions after the Polish keeper's mistakes led to two Benfica goals.

But Flick's team fought back late in the game to secure their spot in the next round, sitting second with 18 points from seven games heading into next week's final group-stage fixtures.

Benfica missed out on a win that would have brought them closer to the top eight, who automatically qualify for the last 16, and instead dropped to 18th with 10 points among the playoff spots.

"We knew it was going to be a difficult game. I know how difficult it is to play here against Benfica. They have players of the highest level," former Sporting forward Raphinha told Movistar.

"We didn't let ourselves get carried away when we were 3-1 down. It was a spectacular match for the spectators. Anyone could have won."

Greek striker Pavlidis opened the scoring after two minutes with a tap-in before Robert Lewandowski equalized from the spot as the VAR awarded Barca a penalty for a Tomás Araújo foul on Alejandro Balde in the 11th minute.

Pavlidis restored Benfica's lead, capitalizing on a poor run out by goalkeeper Wojciech Szczesny, who left the forward with an open goal. The 26-year-old bagged his third with a penalty after Szczesny fouled Kerem Aktürkoglu on the half-hour mark.

A blunder by Benfica keeper Anatoliy Trubin also proved costly as he cleared the ball straight onto Raphinha's head and into the net for a bizarre goal as the visitors pulled one back in the 64th minute to make it 3-2.

Barcelona's defensive misfortune continued, however, and Benfica extended their lead again four minutes later thanks to an own goal from Ronald Araújo before Lewandowski scored his second with another clinical penalty in the 78th.

Substitute Eric García then equalized with a towering header from a fine Pedri cross three minutes from time. Raphinha then found the winner six minutes into stoppage time from a quick counter-attack that stunned the home crowd.

"It was an incredible victory. The team didn't lose their heads throughout the game," defender Garcia said. "When you start the game losing, it messes your plans.

"It's important to qualify for the next round. We came with this objective in mind."

Barça host Atalanta in their final first phase game next Wednesday when Benfica will look to bounce back at Juventus.