World number one Rafael Nadal has announced his withdrawal from upcoming tournaments in Beijing and Shanghai due to the right knee injury that forced him to retire from the US Open earlier this month.

Nadal had to pull out during his semi-final against Juan Martin del Potro in New York and also missed Spain's Davis Cup defeat by France last weekend. The 32-year-old said he visited doctors in Barcelona on Monday and has subsequently made the decision to play neither the ATP 500 event in Beijing nor the Masters 1000 in Shanghai.