Rafael Nadal's dramatic withdrawal from the ATP Finals in London leaves Roger Federer as the only megastar standing at a tournament now looking seriously short of star power. The Spanish world number one produced an astonishing never-say-die performance in his opening round-robin match at the O2 Arena late on Monday despite obvious discomfort, digging deep to save four match points before eventually succumbing to a tenacious David Goffin. With Novak Djokovic and Andy Murray sidelined through injury, Federer is the only genuine star left in London and is the clear favourite to lift his seventh year-end title at the grand old age of 36.

source: AFP