Dimitrov looks for positives after more Grand Slam disappointment

It doesn't get easier, I tell you that much,

said Dimitrov, who was trailing 6-3 6-7(5) 6-3 4-1 against the American when he called it quits

I’ve always pushed myself and my body to the limit, but there comes times where you just have to make an executive decision, and, yeah, I made it today

said Dimitrov, the former world No 3 who had to retire with a groin injury during his fourth-round match against Daniil Medvedev at Wimbledon this year