BARCELONA (AFP) - Barcelona's unlikely Champions League hero Sergi Roberto said he "threw himself" at his 95th-minute goal that sealed one of football's greatest comebacks on Wednesday at a rocking Camp Nou.

Barca scored three times in the final two minutes plus stoppage time to become the first side in Europe's top club competition to overturn a 4-0 first-leg deficit in a breathtaking 6-5 aggregate win.

"I threw myself at it with everything," midfielder Roberto, 25, told BeIN Sports Spain.

"We left Paris very down and now this is incredible. We were prepared for all this. The fans were like 10 extra players and in the end this is all for them." Midfielder Ivan Rakitic said Barca had showed their critics after their first-leg humiliation in Paris three weeks ago that they remain the "best team in the world".

"It's crazy. After Paris, many people spoke hard about our team but tonight was special, we made history," the Croatian told BT Sport.

"We know we are the best team in the world." Luis Suarez's early opener, a Layvin Kurzawa own goal and Lionel Messi's penalty put Barca on the brink of levelling the tie.

However, Edinson Cavani volleyed home what seemed to be the vital away goal for PSG just after the hour mark.

Yet, a quickfire Neymar double teed up Roberto's heroics to the delight of nearly 100,000 fans at the Camp Nou.

"I have never seen anything like this. Only in sport can you live through emotions like this," Barca defender Samuel Umtiti told BeIN Sport.

"We knew how to put them in difficulty, we made them run, we prepared well.

"We lost the first match, but if we play like this it will be complicated to beat us."