PARIS: Rafael Nadal barely broke sweat to reach the French Open semi-finals as fellow Spaniard Pablo Carreno Busta quit with an injury less than an hour into their quarter-final on Wednesday. Nadal, bidding for a 10th title at Roland Garros, was leading 6-2 2-0 when Carreno Busta, who had received lengthy treatment on an abdominal injury at the end of the first set, decided he could not continue. The 31-year-old Nadal has spent only around eight hours on court, dropping 22 games in the process, to reach his record-extending 10th semi-final at the French Open. He will face either defending champion Novak Djokovic or Dominic Thiem next.