What is the fine-grained topic of the following text: World No 1 Murray took only an hour and 36 minutes to beat Germany's Dustin Brown 6-3, 6-2, 6-2 while Nadal, who from 2012 to 2015 was defeated by players ranked respectively by No 100, No 135, No 144 and No 102, beat American Donald Young 6-4, 6-2, 7-5 to reach the last 32 for merely the second time since he was runner-up to Novak Djokovic here in 2011. Only return the topic.
Tennis match results of Andy Murray and Rafael Nadal