Djokovic keeps low key on returning to world No. 1

Novak Djokovic said that he hasn't reflected on returning to world No. 1 but focused on every match at the 2018 Paris Masters here on Thursday.

Djokovic secured his berth in quarterfinals after Damir Dzumhur was forced to pull out due to lower back pains at 2-1 down in the second set. The Serbian triumphed the first set 6-1.

Following Rafael Nadal's withdrawal on Wednesday, Djokovic is set to regain the top spot at the upcoming ATP Rankings next Monday, the first time over the past two years.

"I'm obviously very proud of the achievement, but I haven't been really reflecting on that and focusing on that too much because it's the middle of the week," Djokovic told a news conference.

"I guess it will be different when I finish this tournament, and hopefully the year-end ranking stays the same. That's the aim, and obviously then I'll be able to reflect on my emotions and share with you more," he added.

Djokovic ranked as lowly as 22nd earlier this year, before bouncing back strongly since the Wimbledon, winning 29 of his last 30 matches through to Thursday. He joined Marat Safin as players outside the Top 20 before moving atop the rankings in the same season.

"I understand you guys want to go in depth about it, but please respect that I'm in this tournament and I have to focus on every match and try to get as far as I can. Then I'll be able to speak more about it next time we see each other," Djokovic pointed out.

Djokovic established his quarterfinal clash with fifth-seeded Marin Cilic. Despite a 15-2 head-to-head record, Djokovic lost to Cilic in the same stage in 2016 to cede his top position.

"He was playing really well, I remember. He likes playing indoors. Obviously he has a big serve and big game from back of the court.

"It's going to be a tough one. Tough to receive his missiles. His first serves are really fast, and he uses a lot of rotation and variation with his serves. He can play very aggressively and also defend well," said Djokovic.