Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Unbeaten Federer Marches Into Masters Semi-Finals  HOUSTON (Reuters) - World number one Roger Federer downed  Carlos Moya, 6-3, 3-6, 6-3, Thursday to complete a dazzling  unbeaten run through the round-robin stages into the  semi-finals of the Masters Cup.

Sports