The 42-year-old, taking part in singles for the primary time since final August, misplaced 4-6 6-1 6-4 to Canadian qualifier Rebecca Marino below the lights in Washington, D.C..
“Just a bit rusty,” Williams informed reporters. “I actually put myself in good positions within the third set, too. Simply attempting to shake off some rust. That’s simply to be anticipated. All I can do is simply play one other match and play higher.
“I want I might have pulled this match via for the group and for the match. However (it) doesn’t all the time work out.”
The seven-times Grand Slam winner is ready to play in WTA 1000 occasions in Toronto and Cincinnati over the subsequent two weeks.