If both players lose in the same round, Nadal will retain the world number one ranking heading into the season-ending ATP Finals in London next month. "Single. Day", Djokovic said on Twitter, accompanied by a photo from his early years playing tennis as a kid. But Djokovic was in total control and did not face a break point, breaking Dzumhur's serve three times.
The issue was serious enough to also rule Nadal out of the Masters 1000 events in Indian Wells and Miami, but he went on to enjoy familiar success on clay, including yet another French Open title.
"I am very close to London, to securing my spot mathematically", Cilic said. It's a great journey that I've had.
Turkish President Recep Tayyip Erdogan said the investigation needs to be completed swiftly and that he wants an extradition request for 18 suspects detained in Saudi Arabia to be put on trial in Istanbul. "I'm aware of what's happening, and it's sad, of course".
Filip Krajinovic, last year's runner-up in Paris, slid to a first-round defeat by Karen Khachanov that will send the Serb spiralling down the rankings.
"I didn't come here to win Paris, actually".
World No. 1 Rafael Nadal withdrew with an abdominal injury ahead of his first match at the Rolex Paris Masters on Wednesday meaning that Novak Djokovic will return to the top of the ATP Rankings on 5 November.
Dzumhur had a lengthy massage on his lower back late in the first set.
Clearly in pain, he battled on in an 11-minute sixth game which eventually saw him broken for a second time and, though he continued after receiving physio treatment in a time-out and taking painkillers, there was no way back.
Federer, Nadal and Djokovic have gathered 729 weeks at the world number 1 position so far and this is unlikely to change anytime soon as they are still in front of all the other rivals on the Tour!
Roger Federer, who won his 99th career title at the Swiss Indoors last Sunday, advanced to a third-round meeting with Fabio Fognini after big-serving Milos Raonic retired before their match with a right elbow injury.
Fourth-seeded Alexander Zverev saved all four break points he faced in beating Diego Schwartzman 6-4, 6-2.
Kei Nishikori and John Isner kept their hopes of gatecrashing the Tour Finals alive with victories in Paris.