"It's very difficult to produce good tennis here," Fritz complains about the balls used at the Toronto tournament

Taylor Fritz has advanced to the round of 16 at the Toronto Masters 1000. After his victory against Roberto Carballes Baena (7-5, 7-6) in his opening match, the American defeated Gabriel Diallo (6-4, 6-2) and will face Jiri Lehecka for a spot in the quarterfinals.
However, during the press conference, the world No. 4 was quite critical of the quality of the balls at this Toronto tournament, which he believes do not favor fluid tennis at this Canadian event.
"It's very difficult to produce good tennis here. I feel like we're seeing a lot of poor tennis, with matches full of unforced errors and double faults, and that’s due to two main reasons.
The first is related to the balls, which are the hardest to control on the entire tour. They're not bad, but the Wilson balls from the US Open bounce very quickly off the racket and gain speed when they bounce, unlike the other balls we play with during the season.
We usually see balls slow down, become soft, and stick to the strings, but here, it's the complete opposite. Secondly, this court is very fast, even more so than the one in Washington. If someone takes the initiative and hits a good shot to gain the advantage in the rally, it quickly becomes very difficult to return the ball.
I'm very happy with the improvement in my feel on the court in just a few days. When I first arrived, I could barely keep the ball in play," Fritz told Punto De Break in recent hours.
(Oh, and simple physics, when the ball hits the court, it slows down. It never speeds up, even if it appears to relative a really fast court.)