Europe's biggest club competition kicks off with a thrilling opening matchday, featuring Real Madrid hosting Inter Milan in a rematch of last season's knockout drama. The action spans from Tuesday to Thursday, with six matches each day as all 36 clubs dive into the league phase.

Real Madrid vs. Inter Milan stands out as the game of the day on Tuesday. Arda Guler, Real Madrid's rising star, has emerged as a key player under Jose Mourinho, boasting an impressive 19 chances created this season. Meanwhile, Kylian Mbappe aims to shine after scoring four goals in his first four LaLiga games, looking to bounce back from a missed penalty against Real Betis.

Expert Predictions:

• Score Prediction: Real Madrid 3, Inter 1
• Best Bet: Kylian Mbappe to have 3+ shots on target (+130)

On Wednesday, Arsenal travels to face Napoli, where Riccardo Calafiori is highlighted as a player to watch. He has shown impressive form, making him a key figure in the match. Christos Tzolis also stands out, having delivered three assists in his last four games.

Predictions for Napoli vs. Arsenal:

• Score Prediction: Napoli 0, Arsenal 2
• Best Bet: Both teams to score (-126)

Thursday features Manchester United against Sabah FK, with Bryan Mbuemo expected to deliver a crucial performance. Orphe Mbina of Sabah is also a player to watch, having made a significant impact in the qualifying rounds.

Predictions for Manchester United vs. Sabah FK:

• Score Prediction: Manchester United 3, Sabah 0

Each match promises excitement as teams battle for a strong start in the Champions League.