Nalbandian, Robredo in

Nalbandian beat world number one Roger Federer in last year's final of the event in Shanghai.

The 2002 Wimbledon runner-up has been out of action this week after suffering from a bout of gastroenteritis but booked his ticket to China after results in the Paris Masters went in his favour.

Nalbandian made sure of qualifying when German Tommy Haas beat American James Blake 6-4 6-2 in the third round.

Robredo secured his berth by knocking out Frenchman Paul-Henri Mathieu 6-4 7-6 to reach the quarter-finals in the French capital.

The pair join Federer, Rafael Nadal, Ivan Ljubicic, Andy Roddick and Nikolay Davydenko in the Shanghai field.

Three players -- Blake, Mario Ancic and Haas -- remain in contention for the last spot for the Nov. 12-19 tournament.