British giant-killer Laura Robson forgave English football star Wayne Rooney for a Twitter blunder over her surname on Friday, insisting that celebrity interest can only be good for her and tennis. Robson, the 18-year-old world number 89, became the first British woman since Jo Durie in 1991 to make the fourth round of the US Open with a stunning 6-4, 6-7 (5/7), 6-2 win over Chinese ninth seed Li Na, the 2011 French Open champion. It followed her straight-sets second round victory over triple US Open champion Kim Clijsters which sent the four-time Grand Slam title winner into retirement. Such was the impact made by her win that even Manchester United star striker Wayne Rooney, who earns in two weeks what Robson has made in her entire career, took to Twitter to sing her praises.