Novak beat Alexander on Friday
Djokovic will complete second in the Tokyo Group, named after the principal version of the period finishing competition 50 years prior, and with Spanish world number two Rafa Nadal completing second in the London Group, they have maintained a strategic distance from a semi-last conflict.
Not that a 57th profession meeting is a custom, a long way from it.
The 33-year-old Serb will confront U.S. Open victor Dominic Thiem in Saturday's first semi-last while Nadal plays Medvedev, the most noteworthy player here this week.
Sunday's last will end the competition's noteworthy 12-year remain in London before it re-situates to Turin.
Djokovic was pound 6-3 6-3 by an enlivened Medvedev on Wednesday, yet was a lot more keen against Zverev, another of the more youthful age attempting to flatboat the privileged few off stage.
"Rather than the match against Daniil I found the perfect shots at the perfect time," he said. "I have huge regard for Sascha, an incredible player and difficult to restore 140mph first serves. It was anyone's down for the vast majority of the match."
Djokovic was sufficiently beaten by Zverev in the 2018 last, a match happened in an energizing climate before 18,000 fans. This time the field was vacant on account of the COVID-19 lockdown, a dreamlike setting for a match with such a great amount of riding on it for the two men.
In spite of the level feel, Djokovic was rapidly into game-mode and when world number seven Zverev twofold blamed to drop serve in his first assistance game he held onto control.
Zverev got down to business the subsequent set however botched an opportunity for an early break prior to recuperating from several twofold blames to battle off a break point in the accompanying game.
Djokovic looked restless on occasion and twice needed to hold serve to try not to be hauled into a third set.
In any case, the 17-time Grand Slam champion brought the force level up in the tiebreak, edging 5-3 ahead with an effervescing strike pass. He raised two match focuses with a heavy first serve prior to pressurizing Zverev into a blunder to finish triumph.
Djokovic is offering to approach Roger Federer's record of six ATP Finals titles, while Nadal looks for a first.
While Thiem represents an immense danger to Djokovic's aspiration, Nadal should conquer the week's exceptional entertainer in Medvedev. The 24-year-old Moscovite finished an ideal gathering stage on Friday with a 6-3 6-3 destruction of Diego Schwartzman.
Medvedev lost each of the three matches on his presentation in the competition a year ago, however struck 31 victors to overpower Schwartzman and go 3-0 in bunch play.