Andy Murray's preparation for this month's US Open began with a first-round defeat at the Washington Open.
Of his chances of being seeded for the US Open, the former world number one and current number 50 said: "It's still possible, but I'll need to certainly play better than I did."
There were wins for Kyle Edmund and Jack Draper, but Katie Boulter was defeated in the Silicon Valley Classic.
Boulter shocked eight seed Karolina Pliskova by storming to the first set, only for the Czech to come through 1-6 7-6 6-3.