A year ago, the Winchester High field hockey team ended Watertown’s national-record 184-game unbeaten streak. On Monday, Sept. 24, the two teams met for the first time since that afternoon. This time, Watertown prevailed, 2-0 at Victory Field. “Our last couple of games we’ve been struggling with our team dynamic of positions and we were trying to pull it together,” said Watertown coach Eileen Donahue.