There are many, many tennis tournaments every year. There are four major tournaments - 3 of which (the Australian Open, French Open and Wimbledon) have a women's singles champion. The US Open is not held until August/September.
Australian Open Women's Champion - Victoria Azarenka
French Open Women's Champion - Maria Sharapova
Wimbledon Women's Champion - Serena Williams
There is no "2012 open tennis tournament".
The men's singles at the 2011 Dubai tennis tournament was won by Novak Djokovic. The women's singles at the same tournament was won by Caroline Wozniacki.
The bronze medalist in the Women's Singles Tennis Tournament at the Rio 2016 Olympics was Petra Kvitova.
Svetlana Kuznetsova, Russia
The tennis player who won the Gold Medal in the women's singles tennis tournament during the 2016 Rio Olympics was Monica Puig of Puerto Rico.
Rafael Nadal won the men's singles and Maria Sharapova won for the woman
The country winning the bronze medal in the Women's Singles Tennis Tournament event at the Rio 2016 Olympics was the Czech Republic.
A team won the acc tournament
The country that won the Gold Medal in the women's singles tennis tournament during the Rio Olympics in 2016 was Puerto Rico due to Monica Puig winning the match.