MADRID • Holders Real Madrid edged towards the last 16 of the Champions League, but disturbances between visiting Polish fans and the police marred their 5-1 win at the Santiago Bernabeu on Tuesday.

Five fans and two police officers were treated for minor injuries after clashes outside the stadium before kick-off.

Uefa had already ordered the return match between the sides in two weeks' time be played behind closed doors due to violence and racist abuse in Legia Warsaw's opening 6-0 defeat in Group F by Borussia Dortmund last month.

"Legia are a team with tradition and deserve to play in front of a full stadium," said Legia coach Jacek Magiera.

"These incidents reflect negatively on us and we have to ensure they don't happen again."

Once the action got under way, Real had way too much firepower as Gareth Bale, a Tomasz Jodlowiec own goal and Marco Asensio handed the hosts a comfortable half-time lead despite Miroslav Radovic's penalty.

Lucas Vazquez and Alvaro Morata came off the bench to round off the scoring after the break.

"I am happy with the result, the goals we scored and the chances we created," Real coach Zinedine Zidane told BeIN Sports.

"Our idea was to play with a lot of attacking players. We took some risks, but you can always improve, especially in the chances we gave them."

Dortmund beat Sporting Lisbon 2-1 in the other game in the group, meaning Real and the Germans remain tied at the top of the pool on seven points.

Real and Dortmund will mathematically seal their places in the last 16 should they repeat their success over Legia and Sporting respectively on Nov 2.

Legia had conceded eight goals without reply on their return to the Champions League for the first time in 21 years before arriving in Madrid.

"After 21 years, we have our first Champions League goal. We're very happy about it," added Magiera.

It was also a night to remember for Bale and one to forget for Cristiano Ronaldo.

Bale scored his first European goal in almost two years while Ronaldo endured a rare night without scoring a goal in the Champions League, but still played his part with another fine pass for Morata to slide home the fifth goal six minutes from time.

The prolific Portuguese narrowly missed out on adding to his haul of 98 goals in European competition.

"Ronaldo played phenomenally, playing passes to everyone else," said Zidane.

"He didn't score today but we have a game in four days' time (against Athletic Bilbao) and I'm sure he'll have chances to score then."

AGENCE FRANCE-PRESSE, REUTERS