Alexander Zverev, a top tennis player, had a rough start at Wimbledon. He lost his first match to Arthur Rinderknech, a player not usually seen as a big threat. This loss was a big surprise because Zverev is usually one of the strongest players in the game. Zverev had trained with Novak Djokovic before the tournament. Djokovic, on the other hand, won his first match...