"I would like to apologize to my fans, teammates, coaches, marketing partners and the entire US Soccer and Seattle Reign FC communities for my involvement in a highly unfortunate incident this past weekend," Solo, 32, wrote Thursday on Facebook.
"I understand that, as a public figure, I am held to a higher standard of conduct. I take seriously my responsibilities as a role model and sincerely apologize to everyone I have disappointed."
The former Dancing with the Stars contestant – who police say hit her sister and her 17-year-old nephew while intoxicated at her sister's house outside Seattle last Saturday – spoke of her family directly in the apology.
"I love my family dearly," she wrote. "We, like all families, have our challenges but my sincere hope is that we are able to resolve this situation as a family. Adversity has always made us stronger and I know this situation will be no different."
The Seattle Reign FC and the U.S. Women's National Team goalkeeper also thanked fans for their support, and added: "I am confident in the legal process and believe my name will be cleared."