Djokovic upset by Querrey

The American took an early break in the decider and saved five break points in the ninth game,wrapping an unlikely win on his second match point with a service winner.

He will next face Canadian 14th seed Milos Raonic or France8217;s Jeremy Chardy.

Tsonga wins

Meanwhile Jo-Wilfried Tsonga started his quest for an ATP World Tour final spot with a 6-2 4-6 7-6 second-round victory over fellow Frenchman Julien Benneteau at the Paris Masters on Tuesday. The sixth seeded Tsonga will claim one of the two remaining spots for next month8217;s season-ending showdown at the O2 in London if he reaches the quarter-finals in Paris.

Tsonga,who will take on either Spain8217;s Nicolas Almagro or Albert Ramos in the next round,looked set for a routine win but Benneteau proved to be a tough nut to crack.

Czech Tomas Berdych,the fifth seed who has already secured his London berth,started slowly against Andreas Seppi but eventually sealed a 7-6 6-2 win. He will next face South African Kevin Anderson who beat Nicholas Gasquet 7-65 4-6 6-1.