Novak Djokovic is again so close to the one title that eludes him. And the same nemesis is standing in his way, all over again.

It’s a moment in time: Djokovic v Federer for a title.

Djokovic closed in on a maiden ATP Master 1000 title in Cincinnati with a 6-4 3-6 6-3 victory over Marin Cilic on Saturday.

He then watched Roger Federer advance to the final when David Goffin retired with a shoulder injury early in the second set – with the score 7-6 (7-3) 1-1 in favour of the Swiss.

Struggling with his serve, Goffin got medical treatment on his right shoulder, and retired after the second game of the second set – 62 minutes into the match.

The two tennis greats haven’t faced each other in two years because of injuries and time off the circuit.

They’re back for the 18th shared title match of their careers.

Djokovic leads in head-to-head title matches 11-6. Djokovic leads the overall series 23-22.

Everyone knows who’s favoured in this one.

“It would be the greatest challenge in Cincinnati, without a doubt, because he’s been dominating this tournament historically,” Djokovic said.

Djokovic is trying to become the first to win all nine ATP Masters 1000 events since the series started in 1990.

“My sixth time, I’ll try to win the title,” he said. “Obviously, this time I’m hoping I get my hands on the trophy.”

World No.2 Federer has won it an unprecedented seven times – unbeaten in finals.

Three of those wins came over Djokovic, who is 0-5 in Cincinnati deciders.

Federer has won 14 straight matches in Cincinnati and 17 of his past 18 sets.

He’s held 95 consecutive service games while dominating the tournament.

“It’s great to be back in the finals, against Novak in particular,” Federer said.

“There’s a lot riding on the match. It’s great to refresh a rivalry we’ve had for many years.”