According to the analysis, Zverev is stronger than Ruud and more likely to win the match. However, considering the friendly nature of the tournament, he may relax and lose one set to his opponent. Therefore, I predict Zverev will win with a score of 2:1.
Prediction: Total over 21.5 games in the match between Alexander Zverev and Casper Ruud. Both tennis players have different playing styles: Zverev - aggressive, fast, Ruud - strategic, long. This will lead to drawn-out rallies and intense competition. Betting on the total over 21.5 games seems justified, as the match will be lengthy and protracted, and the outcome may only be decided after many games.
Zverev goes into the match against Ruud as the clear favorite, having excellent form and the advantage in their head-to-head encounters. Ruud, while showing good play against Alcaraz, lacks the necessary consistency and power to challenge Zverev on hard courts. Additionally, his record on indoor surfaces and against top-10 opponents does not support him. Zverev's excellent level of play and powerful serve should lead him to victory in straight sets. Therefore, I am betting on Zverev to win 2-0.