Five-time champion and world number one Rafael Nadal had seemed the likeliest to derail Djokovic at Roland Garros but Federer has cut a swathe through his section of the draw, with fellow Swiss Stanislas Wawrinka his latest victim.
The girls had done their job well but the Swiss stone was close to the button and there was a red guard blocking so I had to draw the stone round from the left, miss the Swiss guard and put the stone right in the centre of the house.