It was the Brazilian forward's superb goal which separated the teams in a first leg marred by an incident of alleged racial abuse aimed at him by Benfica's Gianluca Prestianni, who denies it.

Jose Mourinho's side were still alive in the play-off round tie and took the lead early on at the Santiago Bernabeu through Rafa Silva, although Madrid's Aurelien Tchouameni swiftly levelled.

Benfica gave the record 15-time champions a rough ride but fittingly Vinicius, who never hides from the spotlight, scored on 80 minutes to effectively end the contest.

"That is our Vinicius," Tchouameni proudly told Movistar after the Brazilian's winner.

"To be honest, we didn't start the game very well but we kept our confidence," added the French midfielder.

It was Portuguese coach Mourinho's first time back at the Santiago Bernabeu since he coached Real Madrid from 2010-2013, but he could not lead his team from the dugout because of suspension.

After a week dominated by the fallout from the first leg, Vinicius lined up for Real Madrid alongside Gonzalo Garcia, who stepped in for injured French superstar Kylian Mbappe.

"(Vini) had a great game," Real Madrid coach Alvaro Arbeloa told Movistar.

"Unbalancing them, scoring, creating a lot of danger every time he took them on."

Benfica were without banned midfielder Prestianni, after an appeal against his provisional one-game sanction was turned down earlier on Wednesday, with UEFA still investigating the incident.

Madrid hung a large banner reading "no to racism" at one end, with the game played under the shadow of what happened last week in Lisbon.

There were boos for Vinicius from the visiting Benfica fans and he prodded wide in the early stages, appealing in vain for a penalty as Nicolas Otamendi collided with him after he got his shot away.

Benfica took a deserved lead in the 14th minute as Madrid defender Raul Asencio clumsily turned the ball towards his own goal.

Belgian goalkeeper Thibaut Courtois kept the ball out but Silva was on hand to bundle home from close range.

Stung into action, Madrid pulled level two minutes later through Tchouameni. The French midfielder finished with aplomb from the edge of the box from rampaging team-mate Federico Valverde's cross.

Madrid thought they had gone ahead on the night when Arda Guler stabbed home a loose ball after Garcia's shot was blocked, but the Spanish striker had edged offside and it was disallowed after a VAR review.

- Vinicius 'still dancing' -

Courtois made a fine save from Richard Rios before the break, as Benfica turned up the pressure.

Silva hit the bar with a deflected effort before the hour mark as Mourinho's side at times pinned back the hosts.

Madrid were dealt a setback as Asencio was forced off on a stretcher after colliding with Eduardo Camavinga.

"It's his neck, but it doesn't seem like it will be that bad," said Arbeloa, who confirmed the defender was being taken to hospital for tests.

It had to be Vinicius who settled the tie, though, and Valverde played him scuttling through on goal, with the Brazilian calmly rolling a low shot past goalkeeper Anatoliy Trubin.

Vinicius produced another celebratory dance by the corner flag, as he had done in the first leg in the run-up to the flashpoint with Prestianni, and to the chagrin of Mourinho.

"I'm happy that Vini's dancing, still dancing, because it means he's scoring goals," said Courtois.

This time, the 25-year-old just had thousands of jubilant fans jumping up and down before him, and his goal confirmed Madrid's passage to the last 16.