Stefanos Tsitsipas and Sascha Zverev were both 0-5 respectively against Daniil Medvedev and Rafael Nadal, yet both were victorious in the opening round. Tsitsipas and Zverev will now compete to take the lead in the group, while Nadal and Medvedev compete the keep their advancement hopes alive. And for Rafa, the year-end No.1 ranking is also up for grabs between himself and Novak Djokovic.
Rafael Nadal (1) vs. Daniil Medvedev (4)
This is a rematch from the epic US Open final two months ago. On that day in New York, Nadal was up two sets and a break, seemingly cruising to his 19th Major singles title. But Medvedev would fight his way back to even the match, eventually succumbing to Rafa in a five-set, five-hour thriller. Since that final, Nadal has battled multiple injuries, and has not completed any event he’s entered. Meanwhile the US Open was one of six straight consecutive finals for Medvedev, yet he’s now 0-2 over the past month. Both Nadal and Medvedev admitted they were not at their best on Monday. Rafa is obviously not back to 100% after the abdominal injury he suffered in Paris less than two weeks ago. Jim Courier on Tennis Channel in the US said he’s never seen Nadal hit his forehand worse than he did on Monday. And after taking some time off after his six straight finals, Medvedev has been struggling to rediscover his form, and said he’s been playing poorly in practice. Their only other previous match was also this summer, when Rafa dominated Daniil in the Rogers Cup final, dropping only three games. But judging by Rafa’s level against Zverev on Monday, I like Medvedev’s chances on an indoor hard court to secure his first win over Nadal.
Stefanos Tsitsipas (6) vs. Sascha Zverev (7)
This will be their fifth career meeting, with all of them occurring within the past 18 months. Zverev claimed their first matchup last summer in Washington, but Tsitsipas has taken the last three, including most recently just last month in Beijing. Their rivalry turned in the quarterfinals of the Rogers Cup last August, when Stefanos saved two match points in the second set tiebreak to come back and upset Sascha in three. Tsitsipas has now won six of their last seven sets contested. While Zverev has been a better player since the Laver Cup in September, and served very well against Nadal on Monday, Sascha is still not quite at the level he reached a year ago when he won this event. And Tsitsipas has been the much more confident competitor of the two throughout this year. Based on their head-to-head history and recent form, Tsitsipas should be favored to remain undefeated in the Andre Agassi Group.

