Question: Thomas Johansson and Pieter Aldrich, share which occupation?

Context paragraphs:
2016 Australian Open – Men's Legends Doubles: Jonas Björkman and Thomas Johansson won the title, defeating Thomas Enqvist and Magnus Norman in the final, 4–3, 1–4, 4–3.

2015 Australian Open – Men Legends' Doubles: Jonas Björkman and Thomas Johansson won the title emerging victorious over their compatriots Thomas Enqvist and Mats Wilander in the final in four sets.

2006 St. Petersburg Open – Singles: Thomas Johansson was the defending champion.

1991 Australian Open – Men's Doubles: Pieter Aldrich and Danie Visser were the defending champions, but lost in the first round to Paul Haarhuis and Mark Koevermans. <br> Scott Davis and David Pate won the title, defeating Patrick McEnroe and David Wheaton 6–1, 4–6, 6–4, 5–7, 9–7, in the final.  This was Pate's first Grand Slam title and final, despite gaining the World No. 1 ranking two weeks earlier.

Thomas Johansson: Karl Thomas Conny Johansson (] ; born 24 March 1975 in Linköping), commonly known as Thomas Johansson, is a retired professional tennis player from Sweden.  He reached a career-high Association of Tennis Professionals (ATP) world No. 7 singles ranking on May 10, 2002.  His career highlights in singles include a Grand Slam title at the Australian Open in 2002, and an ATP Masters Series title at the 1999 Canada Masters.  He also won a silver medal at the 2008 Summer Olympics in men's doubles, partnering Simon Aspelin.

Pieter Aldrich: Pieter ("Piet") Aldrich (born 7 September 1965) is a former professional tennis player from South Africa.  A doubles specialist, he won 2 Grand Slam men's doubles titles (1 Australian Open and 1 US Open).  Aldrich reached the World No. 1 doubles ranking in 1990.

1990 Holden NSW Open – Men's Doubles: Darren Cahill and Wally Masur were the defending champions.  Cahill did not compete that year, while Masur partnered Brad Drewett, but lost in the first round. <br>Pat Cash and Mark Kratzmann won the title, defeating Pieter Aldrich and Danie Visser 6–4, 7–5, in the final.

1990 Australian Open – Men's Doubles: Rick Leach and Jim Pugh were the defending champions, but lost in the semifinals to Grant Connell and Glenn Michibata. <br>Pieter Aldrich and Danie Visser won the title, defeating Connell and Michibata 6–4, 4–6, 6–1, 6–4, in the final.

1990 US Open – Men's Doubles: The Men's Doubles tournament at the 1990 US Open was held from August 27 to September 9, 1990, on the outdoor hard courts of the USTA National Tennis Center in New York City, United States.  Pieter Aldrich and Mark Woodforde won the title, defeating Paul Annacone and David Wheaton in the final.

1988 Volvo International – Doubles: Jorge Lozano and Todd Witsken won in the final 6–3, 7–6 against Pieter Aldrich and Danie Visser.

Supporting paragraphs: Thomas Johansson Pieter Aldrich
Answer: professional tennis player