By Alex Dobuzinskis

LOS ANGELES, Sept 4 (Reuters) - Boxer Floyd Mayweather Jr.'s
ex-fiancee filed a lawsuit on Thursday accusing him of
humiliating her after their breakup by posting online a copy of
a sonogram from when she was pregnant with twins and saying she
had an abortion.

The lawsuit filed by Shantel Jackson, 29, in Los Angeles
Superior Court came little more than a week before the
undefeated welterweight's Sept. 13 rematch against Marcos
Maidana.

Mayweather, 37, who served two months in jail in 2012 for
domestic violence against another ex-girlfriend, Josie Harris,
and verbal threats against two of their children, is widely
regarded as the world's best pound-for-pound boxer. He has held
multiple world titles.

The legal action brought by Jackson, which says Mayweather
violated her privacy, assaulted her and virtually imprisoned her
at his Las Vegas home, threatens to distract from the athlete's
return to the limelight.