Where is Alexander Zverev vs Jack Sock taking place? 02 Arena, London
When is Alexander Zverev vs Jack Sock on? Thursday 16th November, 2017
What time does Alexander Zverev vs Jack Sock start? 20:00 (UK)
What channel is Alexander Zverev vs Jack Sock on? Sky Sports Arena
Zverev will take the positives from his loss to Federer as he matched the 19-time Grand Slam champion for the majority of the match.
The young German will be fired up for this winner-takes-all clash with Sock as he aims to make the semi-finals on his debut ATP World Tour Finals appearance.
Zverev's 2017 hard court statistics make for positive reading compared to Sock's. He has won a greater percentage of service and return games and edges the American on break points points both converted and saved.
Sock is full of confidence and playing some excellent tennis at the moment and will relish the chance of becoming the first North American to progress to the season-ending semi-finals since Andy Roddick in 2007.
His composure under pressure was vital in a close match with Marin Cilic and he impressively came from 1-3 down in the deciding set to clinch victory.
Sock and Zverev have only met twice before with both winning a match each, although Sock's victory did come on an indoor hard court in Stockholm last year.
There have been two meetings between the two players, and there has been one win each.
Four of the five sets played between the two players have finished with a scoreline of 7-6 or 6-4.
Alexander Zverev has a first serve ratio of 64% this season in comparison to Jack Sock's 59% (all surfaces).
Alexander Zverev has made 589 aces so far this season in comparison to Jack Sock's 360.
Alexander Zverev has converted 46% of break points so far this season in comparison to Jack Sock's 36% (all surfaces).
Alexander Zverev has won the first set in both his previous meetings with Jack Sock.
Alexander Zverev has six career titles to his name in comparison to Jack Sock's four.
There are no complicated permutations here as the winner is guaranteed to qualify for the semi-finals. A three-setter is certainly on the cards as both players have played good tennis in the tournament, but talented youngster Zverev gets the nod due to the greater variety in his game and all-round more impressive hard court statistics.