Real booked their place in the final when substitute Arda Guler lifted a corner to Ruediger, who headed the equaliser that put Real Madrid through on aggregate.
A round-up of Wednesday's UEFA Champions League last-16 first leg matches.
LaLiga leaders Barcelona lost 1-0 to Leganes on Sunday
Crashing out at the group stage again would be a huge blow to Barcelona's finances, whose perilous state led the club's board to sell a stake in their TV rights and agree to the sale of their audio-visual division.
Spain manager Luis de la Fuente left Barcelona's 17-year-old defender Pau Cubarsi and midfielders Marcos Llorente and Aleix Garcia out of his 26-man squad
The first legs of the ties will take place on February 16, with the return match a week later on February 23.
Messi and Iniesta shared the Barca dressing between 2005 and 2018, together winning nine La Liga titles, four Champions League crowns and won two trebles in 2009 and 2015.
Manchester City came from behind to beat Club Brugge 3-1 and secure their place in the Champions League playoffs
Alves joined Barcelona from Sevilla in 2008 and made 391 appearances, becoming a regular under ex-managers Pep Guardiola, Tito Vilanova, Tata Martino and Luis Enrique before leaving for Juventus in 2016.
When asked about Barcelona's youth and talent in midfield especially, Gundogan said he had a lot to offer the team with his experience.
Barcelona suffered a shock 1-0 LaLiga defeat at Real Sociedad on Sunday that ended their seven-match winning streak in all competitions.
Dani Olmo came off the bench in the second half to give Barcelona the spark they needed on his debut, against Rayo Vallecano.
PSG's Champions League tie with Newcastle is like a final, says Luis Enrique
Antoine Griezmann scored two goals and provided two assists as Barcelona staged a stunning last-gasp comeback before beating Granada 5-3
Croatian forward Ante Budimir scored twice to help Osasuna earn a shock 4-2 home win over leaders Barcelona.
Karim Benzema and Vinicius Jr both scored a brace to give the LaLiga leaders a 4-1 home win over Valencia
Inter Miami manager Javier Mascherano said on Thursday it was "impossible" to even consider bringing Neymar to the club
News of all that transpired on and off the football field.
Zinedine Zidane's side joined Atletico Madrid on 66 points and moved top of the table
Barca said the move was part of their efforts to bring soccer and music together.
Messi brace leads Barca to within four points of La Liga summit
'Barca is a great club that has to win the Champions League, that's why I came here.'
The Argentine then lifted his shirt to reveal a red and black replica kit of his hometown club Newell's Old Boys bearing the number 10 which Maradona wore during his brief spell at the Rosario side in 1993.
Both managers have struggled in the Champions League this season, with PSG on seven points and 25th in the standings, one place outside the knockout phase playoff zone, while City are one point ahead in 22nd.
Chelsea struggled to deal with Barca's punishing press and they went 2-0 behind in the 14th minute
Barcelona will go to the international break on top of the standings on a perfect 12 points from four games, five ahead second-placed Villarreal and seven clear of bitter rivals Real Madrid
Barcelona were held 1-1 at home by Napoli in the first leg of their Europa League knockout stage playoff
The Dutchman burst through the middle of the pitch and laid the ball off for Messi to dribble into the net for an 18th league goal of the season, extending his lead at the top of the scoring charts.
Goals from Memphis Depay, Luuk de Jong and the returning Ansu Fati helped Barcelona claim a much-needed 3-0 home victory over Levante in LaLiga on Sunday.
IMAGES from soccer matches played on Monday.
Real Madrid are comfortably perched on top of the La Liga standings with 66 points while Barca are now third on 54 points with a game in hand, three points behind second-placed Sevilla.
Messi was named the top-earning footballer in the world by French newspaper L'Equipe earlier this year, claiming an estimated 8.2 million euros ($9.97 million) per month from Barca.
Luuk de Jong's first-half header gave Barcelona a 1-0 win at Mallorca
'But when I arrived in Barcelona, I was told that it was no longer possible, that I could not stay and that I had to find another club, because Barca could not afford to extend my contract. That changed my plans.'
IMAGES from the Champions League matches played on Tuesday.
Luis Suarez has agreed a deal with the club to end his contract and settled on personal terms with Atletico Madrid,
Barca will now visit seventh-placed Osasuna on Saturday before hosting Young Boys in the Champions League next week, when they will look to rebound following a 2-1 loss in their opening match at Monaco.
Rangers joined Barca in the last eight despite losing 2-1 at Red Star Belgrade, progressing 3-2 on aggregate.
Marseille cement second place with Montpellier win
Ancelotti's second-string players proved they were up to the task as they secured three points for Real and kept them on course for the inevitable LaLiga title celebrations.
