Round-up: Rafa Nadal broke the resistance of Jerzy Janowicz's to win 7-5 6-4 and reach the last eight of the Paris Masters.
Swiss Stanislas Wawrinka and France's Richard Gasquet snatched the last two places for next week's ATP World Tour finals.
Jo-Wilfried Tsonga double-faulted on match point to lose to Kei Nishikori and fail to qualify for the World Tour Finals.
Novak Djokovic started his Paris Masters campaign with a routine second-round 7-6(3) 6-3 win over Pierre-Hugues Herbert.
Marin Cilic won his first match since returning from a doping ban with a 5-7 6-1 6-4 success against Igor Sijsling in Paris.
Round-up: Roger Federer came from a set down to beat world number 48 Denis Istomin 4-6 6-3 6-2.
Tomas Berdych and Stanislas Wawrinka were both ousted from the Swiss Indoors event in Basel in surprise first-round results.
Roger Federer went out of the Shanghai Masters at the last-16 stage as he lost to world number 42 Gael Monfils.
Round-up: Novak Djokovic and Rafael Nadal were in superb form to advance to the last eight of the Shanghai Masters.
Feliciano Lopez came through a tough clash with Jarkko Nieminen to make it through the opening round of the Shanghai Masters.
ATP World Tour rankings on Monday (last week's positions in brackets):
Top seed Juan Martin del Potro beat Canada's Milos Raonic in the battle of big-servers on Sunday to bag the Japan Open title.
Top seed Juan Martin del Potro beat Nicolas Almagro of Spain 7-6(7) 7-6(1) in the semi-final of the Japan Open.
ATP World Tour Finals
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