This is a revenge game for Casper Ruud after Matteo Berrettini knocked him out of the US Open in 2020 when Casper was 21 years old and ranked 30th at the time (Berrettini 6th). Casper Ruud has won 2 of their 3 matches since including last match this year.
Now 7th ranked Ruud is in better form and has been better on hard this season. He beat a lower ranked Fokina fairly easily to get to quarterfinals where 17th ranked Berrettini had a tough 5 set match vs 39th ranked Fokina.
Casper should have more gas in the tank after last round, is in better form and has the motivation to take down Matteo Berrettini in the quarterfinals.