Taylor Fritz struggled with the Washington heat a lot in the matchup against Evans and he ultimately retired from the match in the final set.
Fritz retired because he was down 1-4 and there was no reason to push himself further in the brutal conditions that left him playing lightheaded for the majority of the match. Washington is experiencing a significant heatwave this week with temperatures regularly over 30 (80) degrees. When you add the occasional rain into that mix you get a weird combination of factors that include high humidity, a high temperature and the hard courts that reflect the heat even more.
Fritz struggled with it a lot:
"First off, health-wise I’m okay. I feel embarrassed not being able
to finish a match. I’ve never pulled out of a match in my life but after
my episode in Toronto last year where I pushed myself to finish the
match and almost passed out, I assured my team I would pull out if
similar symptoms happened again. Typically, I pride myself on my fitness and ability to compete in very hot/ humid, brutal conditions.”
Despite the loss, Fritz was happy bout his week in Washington because his foot held up pretty well this week which was important for him. Why? Well, he explained it:
"Many don’t know this but I have been in a boot since Wimbledon and
although I have been doing heavy fitness while in the boot, no amount of
assault bike in the gym can prepare you for playing a long match in
these type of conditions. I started practice
on court again this Saturday so playing here in DC was definitely
ambitious but I’m really happy with my actual level of tennis and I’m
really happy that my foot is feeling good. Today I constantly felt like I
was going to pass out, my vision was going fuzzy, and the only thing
that can really prepare me for playing in these conditions… is playing
in these conditions.”