Tennis: Serena Williams says comeback is not about adding to her trophy collection [SOUND]

# Tennis: Twenty-three-time Grand Slam champion, Serena Williams, says she has nothing to prove as she prepares to make a return after four years. The 44-year-old American will play her first competitive match at Queen’s Club in London this week, when she partners 19-year-old Canadian Victoria Mboko in the women’s doubles. She has also added the Berlin Open to her schedule. Williams says she is not putting pressure on herself to win: