Here are five matches to track on what is potentially another rainy day at Wimbledon.
1. Gentlemen's Second Round: No. 4 Andy Murray vs. Ivo Karlovic (Centre Court)
Neither the U.S. nor (especially) Great Britain have produced a wealth of elite tennis talent recently, but both countries have had solid weeks at the All-England Club. On Wednesday, American's Andy Roddick and Sloane Stephens advanced, while 20-year-old Heather Watson became the first British female to reach the third round at Wimbledon in a decade.