premise: Laura Robson won a championship.
hypothesis: Laura Robson . She debuted on the International Tennis Federation ( ITF ) junior tour in 2007 , and a year later won the Wimbledon Junior Girls ' Championship at the age of 14 . As a junior , she also twice reached the final of the girls ' singles tournament at the Australian Open , in 2009 and 2010 . She won her first professional tournament in November 2008 . Robson was the first British woman since Samantha Smith at Wimbledon in 1998 to reach the fourth round of a Grand Slam tournament , doing so at the 2012 US Open and the 2013 Wimbledon Championships . She won a silver medal in the mixed doubles at the 2012 London Olympics playing with Andy Murray , with whom she also reached the 2010 Hopman Cup final .