Rio de Janeiro: World number one women tennis player Serena Williams was disappointed by her defeat against Ukraine's Elina Svitolina (6-4, 6-3) and regretted the missed opportunity at the 2016 Olympics.

"It was a great opportunity. It didn't work out the way I wanted it to be, but at least I was able to make it to Rio. That was one of my goals," the reigning Olympic gold medallist said on Tuesday, reports Efe news.