Emma Raducanu will "hopefully" be able to play at Indian Wells but says last year's wrist problem has returned.
The 20-year-old British number one is due to play Danka Kovinic of Montenegro on Thursday in the 16,000-capacity Stadium 1.
But Raducanu had strapping on both of her wrists during Wednesday's one-hour practice session with her coach Sebastian Sachs.
"The same issue that I had last year has stared to flare back up," she said.
Speaking to BBC Sport, she added: "I've definitely been managing my load. It's something that has just come back, so I'm trying to be as cautious as possible.