Serena Williams wins her first match of her last U.S. Open

Williams defeated Danka Kovinic 6-3, 6-3 at the Arthur Ashe Stadium

"Just keep supporting me," Williams said after the match, "as long as I'm here."

Williams has won six U.S. Open singles championships, the last in 2014

she is the overwhelming favorite on Monday night, with a 20-0 record in U.S. Open first-round matches

Williams has only played four matches this year, and only won one

After she retires from tennis, Williams will continue her pioneering ways and focus on developing a venture capital firm she formed eight years ago.

"The reception was really overwhelming," Williams told reporters. "It was loud and I could feel it in my chest

"At this point, honestly, everything is a bonus for me," Williams said

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