PARIS (Reuters) - 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 record-extending 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 Austrian Dominic Thiem next.