Yes, in fact, at the 2000 Olympics in Sydney, Venus won the singles gold medal \and the doubles gold medal with Serena
Serena Williams won the Gold Medal for Women's singles. Serena Williams and Venus Williams won Women's doubles Gold Medal
Serena And Venus Williams
Serena Williams United States (USA)
Rafael Nadal (men's singles) Roger Federer and Stanislas Wawrinka (men's doubles) Elena Dementieva (women's singles) Serena Williams and Venus Williams (women's doubles)
The silver medalists in the Mixed Doubles Tennis Tournament event at the Rio 2016 Olympics were Venus Williams and Rajeev Ram.
The winners in the Mixed Doubles Tennis Tournament event at the Rio 2016 Olympics were Bethanie Mattek-Sands and Jack Sock for the gold medal, Venus Williams and Rajeev Ram for the silver medal, and Lucie Hradecka and Radek Stepanek for the bronze medal.
The gold medal in the Women's Singles Badminton event at the Rio 2016 Olympics was awarded to Carolina Marin.
The bronze medal in the Women's Singles Badminton event at the Rio 2016 Olympics went to Nozomi Okuhara.
Spain was the gold medal winner in the Women's Singles Badminton event at the Rio 2016 Olympics.
India won the silver medal in the Women's Singles Badminton event at the Rio 2016 Olympics.
Albert Demchenko of Russia won the silver medal in Men's singles Luge at the 2014 Sochi Olympics.