If I were Xabi Alonso, I will aim for a draw with Bayern Munic and then concentrate in winning other teams and avoiding drawing smaller teams as much as possible.
Why though? If your aim is to win the league you'll need to take points from your rivals too. Especially when they have a 4-point gap atm. Aiming for a draw feels like they don't have the confidence before the match even begins. I don't know what Alonso's or Leverkusen's goal this season is, but I'd be disappointed if they're just aiming for a top 4 and playing safe every now and then instead of trying to win a second Bundesliga trophy.