Top-seeded Alexander Zverev advanced to the semifinal of the Halle grass-court tournament on Friday. He defeated Belgian qualifier Raphael Collignon in a closely contested match. Zverev won both sets in tiebreaks, with scores of 7-6 (10) and 7-6 (2). The match showcased a high level of competition, as both players fought intensely. This victory propels Zverev further in the tournament, solidifying his position as a strong contender. He will now await his opponent in the semifinal round. The German player is aiming for the title at the prestigious grass-court event.