Considering what group Milan found themselves in in the UEFA Champions League (remember that there were PSG, Dortmund, Newcastle), getting into the Europa League playoffs is a great result for Milan. The team is in great shape now - in the last game Milan beat Napoli, reducing the gap from Juventus to 1 point.
Rennais had quite easy opponents in the group stage (from the most difficult was only Villarreal, which spends not the best season). Although the team is now in great shape - 6 wins in a row in Ligue 1, but even here the team had a fairly easy calendar. In a game against such an opponent, I have little faith in the success of Rennais.
Prediction: Milan to win. We recommend the “1 Win” bet, odds 1.67