Uruguay defender Diego Godin has been instrumental in Atletico's success in recent season.
Atletico Madrid are without influential centre-back Diego Godin (hamstring) for their Champions League semi-final first leg against Bayern Munich.
Former Liverpool and Chelsea striker Fernando Torres should start after scoring five goals in six games.
Bayern Munich have named defender Jerome Boateng, who has missed three months with a groin injury, in their 22-man squad for the trip to Madrid.
Netherlands winger Arjen Robben (thigh) is ruled out for the German giants.
Bayern are one win away from securing a fourth consecutive Bundesliga title, while Atletico are level on points with leaders Barcelona in their quest for a second Spanish title in three seasons.
Atleti 'as good as Barca and Real Madrid' - Guardiola
Atletico have now reached the last four in two of the past three seasons and Bayern Munich manager Pep Guardiola says they can be considered as formidable an opponent as Real Madrid or his former side Barcelona.
"The biggest achievement for Atletico is that now it can be compared to Barcelona and Real Madrid," Guardiola said. "This is Simeone's biggest achievement.
"Atletico have a big heart and a very good mentality. This is a top, top team. They are very, very dangerous.
"I know exactly how special Atletico's team is and with how much determination they play."
Atleti out for revenge
Atletico, who have never been crowned European champions, are facing the club that denied them in the 1974 European Cup final.
Bayern's maiden win sparked a run of three straight successes, with current coach Pep Guardiola - in his final season before joining Manchester City - now trying to clinch their sixth triumph in Europe's leading club competition.
Atletico's fortunes have contrasted sharply, with another final defeat - against neighbours Real Madrid in 2014 - the nearest they have been to winning the trophy since.
Simeone expects tough test
Diego Simeone's side beat holders Barcelona in the quarter-finals and have conceded just five goals in this season's competition.
"I'm expecting a hard match against an opponent with a lot of attacking potential, against a coach who changes from game to game," Simeone said.
"Obviously we have a coach and players with different characteristics. But in wars it isn't the side with the most soldiers that wins, it's the side that uses its soldiers better."
Hmm.. Seriously is gonna be an interesting game as we await for the UEFA Champions League match today.