<Tr> <Td> </Td> <Td> 1988 Seoul </Td> <Td> Singles </Td> </Tr> <Tr> <Td> </Td> <Td> 1988 Seoul </Td> <Td> Doubles </Td> </Tr> <P> Stefan Bengt Edberg (Swedish pronunciation: (ˈsteːfan ˈeːdˌbærj); born 19 January 1966) is a Swedish former world no . 1 professional tennis player (in both singles and doubles). A major proponent of the serve - and - volley style of tennis, he won six Grand Slam singles titles and three Grand Slam men's doubles titles between 1985 and 1996 . He also won the Masters Grand Prix and was a part of the Swedish Davis Cup - winning - team four times . In addition he won four Masters Series titles, four Championship Series titles and the unofficial Olympic tournament 1984, was ranked in the singles top 10 for ten successive years, 9 years in the top 5, and is considered one of the greatest players of his era . Edberg began coaching Roger Federer in January 2014, with this partnership ending in December 2015 . </P> <P> Edberg first came to the tennis world's attention as a junior player . He won all four Grand Slam junior titles in 1983 to become the first (and only) player to achieve the "Junior Grand Slam" in the open era . Later that year as a professional, Edberg won his first career doubles title in Basel . Edberg accidentally caused the death of linesman Dick Wertheim with an errant serve during the 1983 US Open . </P>

Former world number one tennis player who coached roger federer in 2014