Question: Rennae Stubbs and Boris Becker, share which occupation?

Context paragraphs:
2001 Australian Open – Mixed Doubles: Rennae Stubbs and Jared Palmer were the defending champions but only Stubbs competed that year with Todd Woodbridge.

1996 DFS Classic – Doubles: Manon Bollegraf and Rennae Stubbs were the defending champions but only Stubbs competed that year with Lisa Raymond.

Boris Becker: Boris Franz Becker (] ; born 22 November 1967) is a German former world No. 1 professional tennis player.  He was successful from the start of his career, winning the first of his six major singles titles aged 17.  He also won five year-end championships, 13 Masters Series titles, and an Olympic gold medal in doubles.  "Tennis" magazine ranked him the 11th best male player of the period 1965–2005.

2011 Aegon International – Women's Doubles: Lisa Raymond and Rennae Stubbs were the defending champions, but Stubbs decided not to participate. <br>

2011 Qatar Ladies Open – Doubles: Květa Peschke and Rennae Stubbs were the reigning champions when the event was last played in 2008.  Stubbs retired from the sport two weeks before this event.

2004 Toray Pan Pacific Open – Doubles: Elena Bovina and Rennae Stubbs were the defending champions, but had different outcomes.  While Bovina did not compete this year, Stubbs pertnered with Cara Black and successfully defended her title, defeating Elena Likhovtseva and Magdalena Maleeva 6–0, 6–1 in the final.  It was the 2nd title in the year for the pair, and the 14th title for Black and 44th title for Stubbs, in their respective careers.

2003 Adidas International – Women's Doubles: Lisa Raymond and Rennae Stubbs were the defending champions, but competed this year with different partners.  Raymond teamed up with Lindsay Davenport and lost in the first round to Anna Kournikova and Chanda Rubin, while Stubbs teamed up with Conchita Martínez and lost in the final to tournament winners Kim Clijsters and Ai Sugiyama, 6–3, 6–3.

Rennae Stubbs: Rennae Stubbs (born 26 March 1971) is an Australian retired tennis player.  She was an Australian Institute of Sport scholarship holder.  She has won four Grand Slam doubles titles and two Grand Slam mixed doubles titles.  She was ranked world No.1 in doubles for three weeks in 2000.  She represented Australia at four successive Summer Olympic Games: Atlanta 1996, Sydney 2000, Athens 2004, and Beijing 2008.

2007 Acura Classic – Doubles: Cara Black and Rennae Stubbs were the defending champions but chose to participate with different partners.  Stubbs teamed up with Kveta Peschke and was eliminated in the second round.  Black paired up with Liezel Huber and together they won the title after defeating Victoria Azarenka and Anna Chakvetadze 7–5, 6–4 in the final.

2004 JPMorgan Chase Open – Doubles: Mary Pierce and Rennae Stubbs were the defending champions, but had different outcomes.  While Pierce did not compete this year, Stubbs partnered with Cara Black, but they lost in first round to Daniela Hantuchová and Chanda Rubin.

Supporting paragraphs: Rennae Stubbs Boris Becker
Answer: tennis player