Who: Atletico Madrid vs BarcelonaWhat: Champions League quarterfinal, second legWhere: Metropolitano Stadium, Madrid, SpainWhen: Tuesday at 9pm (19:00 GMT)How to follow: We’ll have all the build-up on Al Jazeera Sport from 16:00 GMT in advance of our live text commentary stream.Spanish football clubs Atletico Madrid and Barcelona will meet for the third time in 10 days but, crucially, with a UEFA Champions League (UCL) semifinal berth on the line.Atletico may be far behind their Catalan opponents in the La Liga title race, but they go into Tuesday’s fixture as strong favourites, thanks to a first-leg victory against 10-man Barcelona at Camp Nou, and a strong home form in Europe this season.Barcelona, the reigning La Liga champions, will have it all to do if they are to keep alive their dream of clinching their sixth UCL trophy, and first since the 2014–2015 season.Here is all to know before the knockout tie:What happened in the first leg at Camp Nou?Julian Alvarez and Alexander Sorloth scored in each half as Atletico earned a precious 2-0 lead in a tense first-leg clash.The La Liga leaders were on top in the first half before Pau Cubarsi was sent off for bringing down Atletico’s Giuliano Simeone, who was through on goal.Alvarez whipped home the free kick at the stroke of halftime, and Sorloth doubled their advantage in the 70th minute to give Atletico a strong chance of reaching the semifinals. Julian Alvarez, centre, opened the scoring against Barcelona in Atletico’s first-leg 2-0 win last week [Nacho Doce/Reuters]How …
