Alaba, a free-kick expert, sat out Bayern's final training on Tuesday with a thigh strain, but Heynckes hopes the left-back will be fit. "It's true that in the last two games we have had chances and we have not taken them but now we are going to have a game on Wednesday away from home".
Tolisso is expected to start on the bench, if he is fit, with Javi Martinez in the defensive midfield.
Despite his improvement and inevitable desire to prove his worth against Madrid, James is not guaranteed to start, with Heynckes suggesting it will be either the Colombian or Thiago Alcantara in his line-up.
The key for the Spaniard will be preventing Real's orchestrator from having the time to make key passes and threading the ball through the eye of the needle, with his Champions League pass completion of 91.8 per cent being remarkably higher than Madrid's overall team collective of 89 per cent - the highest out of all clubs.
The Champions League is typically dominated by the teams who are able to spend the most money and get the best players.
Real's goal-scoring superstar has hit the net 42 times in all competitions.
Bayern host Madrid in the first leg of the semi-final at the Allianz Arena in a repeat of last seasons quarter-final fixture.
"We have the big goal of moving into the final", said Heynckes who will be replaced by Eintracht Frankfurt's Niko Kovac next season.
Real Madrid, Chelsea and Paris Saint-Germain have all been credited with interest in the Poland global, who's scored 39 goals in 43 games this season.
"You can only stop him as a team", Boateng insists. Heynckes says there is no clear favourite for the Allianz Arena clash, but Real have won five of their last six matches against Bayern.
Sergio Ramos and Ronaldo each scored twice for Madrid in the return match.
Madrid knocked out Paris Saint-Germain, who smashed the world transfer record to sign Neymar in a bid to bring them closer to the title, in the last 16, while Manchester City, the most expensively assembled team in history, lost 5-1 on aggregate to Liverpool in the last round.
"Of course, the semi-final offers a great stage".
The veteran German said: "Both of our teams will provide us with attractive football. But I was also always an admirer of Zizou both as player and coach". It's a semi-final - it's completely different to last season. Vidal received a harsh second yellow card for what looked like a good challenge on Marco Asensio.
The Germany defender can expect a busy night marking Ronaldo. Above all he is a player who has fantasy, has an overview. We know their players are really good and able to score too.
This is published unedited from the PTI feed.