"I was even kind of surprised the first set," Medvedev said after the match of Tsitsipas' level.
"That's why it went so easy on his side because I didn't expect such great level from him, especially I felt like I played good guys like [Alexander] Bublik, [Cristian] Garin, Tommy Paul actually, that played good from baseline, and I felt that I was on top of them in the rallies so I felt I could continue doing this today like on the hard courts.
"It was not the case so I had to change."
A strange finish for Medvedev
Medvedev did change, incorporating more variety, hitting with more pace, and if it weren't for clutch shot-making by Tsitsipas late in the second and third sets the match might have turned out differently.
The contest hung in the balance with Medvedev serving at 5-6, 40-0 in the third set, and threatening to force a tiebreaker. But Tsitsipas never stopped fighting and won the next five points, including a stunning match point that saw the Greek rip a winner off an underarm serve from Medvedev. Yes you heard that correctly - an underarm serve on match point!