The two-legged ties will be played from February 16.
The Portuguese can expect a hostile reception in Valencia, who had to suffer 15 of his goals for Real Madrid and are returning to the Champions League for the first time in three years.
Livepool striker and Dembele close in on Camp Nou move
Nothing usually fazes an ice cool Zlatan Ibrahimovic but the Sweden striker was taken aback when he failed to score a penalty during Paris St Germain's 2-2 draw with Manchester City in their Champions League quarter-final first leg on Wednesday.
Jim Ratcliffe's company INEOS formally entered the bidding process to buy Manchester United on Tuesday, months after the club owners, the Glazer family, said they were considering selling the club as they explore "strategic alternatives".
A court document released in July, alleges that Barcelona initiated negotiations in 2011 with the player, paying him 40 million euros to ensure his move when his contract with Santos expired in 2014 and thereby preventing other clubs from signing him.
Ferran Torres scored a brace and Ousmane Dembele made two assists as a red-hot Barcelona rolled over Osasuna 4-0 on Sunday to earn their fourth consecutive LaLiga win.
La Liga leaders Real Madrid were held to a frustrating 1-1 draw at lowly city rivals Rayo Vallecano on Sunday as Joselu's early strike was cancelled out by Raul de Tomas' penalty, a result that could spice up the title race with surprise package Girona.
Barcelona need to avoid getting sucked into the Spanish obsession with El Clasico when they face Ajax Amsterdam in the Champions League on Tuesday.
Angel Di Maria volleyed in with 15 minutes left to give Paris Saint-Germain a 1-0 win at Stade Rennais on Friday and extend their lead at the top of the Ligue 1 table to 10 points.
The clinical Argentine Messi now has 11 goals in his last five games in all competitions and with record signing Ousmane Dembele injured and Luis Suarez rested, he put on a sensational show at Camp Nou to extend Barcelona's La Liga lead.
Manchester United striker Zlatan Ibrahimovic is relishing his time at the Premier League club and is in talks to extend his contract, saying he "never leaves a job unfinished".
Photos from matches played in the French Ligue 1 and Serie A matches played on Saturday
Luis Suarez said Barcelona have not given up on the Champions League despite a "difficult and painful" 4-0 drubbing by Paris St Germain in their last 16 tie this week.
IMAGES from the Champions League matches played on Tuesday.
In the streets of the capital, revellers partied early into the hours of Monday. Fans climbed onto bus stops and lamp-posts, blared horns, banged drums and set off fireworks into the night sky. Some even climbed the tall Obelisco monument.
The three match-ups which are likely to have a strong bearing on the result in Sunday's FIFA World Cup final.
The former Real Madrid wide midfielder, whose 59.7 million pounds ($93.28 million) transfer a year ago set a British record, is preparing to join the French champions for a considerably lower fee, according to media reports.
Neymar becomes goodwill ambassador for world's disabled
Paris St Germain collected their first trophy of the season when Edinson Cavani's double secured a 2-1 victory against Olympique Lyon in the French League Cup final on Saturday.
Liverpool's Brazil midfielder Philippe Coutinho is on the verge of signing for La Liga leaders Barcelona in a club-record deal, according to Spanish media reports.
All the latest news from the summer transfer window...
Manchester United manager Jose Mourinho has no concerns over striker Zlatan Ibrahimovic's barren spell as he expects the Swede's 'brilliant' attitude to soon be rewarded with goals.
Mumbai City FC lost 2-0 to Iranian Club Nassaji Mazandaran in their first AFC Champions League group stage game at home.
The sources requested anonymity because the matter is confidential. Representatives for Manchester United and Sheikh Jassim did not immediately respond to requests for comment.
Zhang Jiao, after realising her dream of witnessing Argentina soccer great Lionel Messi lift the World Cup every match he plays from now on is "precious".
He can be called a flawed human but definitely a great player. That's Luis Suarez for you.
The move would end a turbulent spell at the club for the Argentine, who has fallen out with fans along on the way and provided fodder for the gossip columns thanks to his marriage to Wanda Nara, a media personality who also acts as his agent.
Air travel by the top 20 footballers nominated for the 2019 Ballon d'Or was responsible for producing 505 tonnes of carbon dioxide (CO2) emissions this year alone, according to a climate change researcher.
Paris St Germain reduced Olympique Lyonnais' Ligue 1 lead to one point after Ezequiel Lavezzi's first-half strike earned the champions a 1-0 home win over Stade Rennes on Friday.
Inter Milan escaped Etihad Stadium with a surprise 0-0 draw against Manchester City in the Champions League on Wednesday.
Chelsea won their second Champions League title and denied Pep Guardiola's Manchester City their first with Kai Havertz grabbing a first-half goal to secure a 1-0 win in Saturday's all-English final at the Estadio Do Dragao in Porto.
Zlatan Ibrahimovic's international career did not end in a blaze of glory at the European Championship but the striker said he was proud to have represented Sweden at the tournament.
Barcelona are suing Neymar for 8.5 million euros for alleged breach of contract and demanding he return the loyalty bonus paid after he renewed his deal in October, less than a year before he signed for Paris St. Germain, the club said Tuesday.
Manchester United's Spanish international Juan Mata has promised to give 1 per cent of his earnings to charity and wants all fellow professional footballers to do the same.
Manchester City squandered a three-goal lead to draw 3-3 with Feyenoord in the Champions League on Tuesday.
Neymar prompted more speculation with a brief Instagram video, showing a black-and-white image of himself in a shirt with the badge of Barcelona and a quote from the Bible, which was widely reproduced on news websites.
Last season's runners-up Liverpool, big-spending French league champions Paris St Germain and Carlo Ancelotti's Napoli were thrown together in the pick of the groups while holders Real Madrid must face last season's semi-finalists AS Roma.
Jose Mourinho's next managerial role has been revealed with the Portuguese leading 'England' against Claudio Ranieri's 'Rest of the World' side as the former Chelsea bosses clash at Old Trafford on June 5 in a charity match for UNICEF.
The former Barcelona forward, key to his country's hopes in Russia, came on as a halftime substitute and provided the moment of inspiration for win the game in the 69th minute.