Brad Guan (born 10 July 1958) is a former professional tennis player from Australia.^[1]

Guan made his first appearance in the main singles draw of a Grand Slam at the 1981 Australian Open, where he lost in the opening round to Pat Du Pré, in five sets.^[2] He was also beaten in the first round of the 1982 French Open, by Juan Avendaño, but made the men's doubles quarter-finals, with Derek Tarr as his partner.^[2] This equaled his best Grand Slam performance, as he also reached the quarter-finals in the doubles at the 1980 Australian Open, partnering Ernie Ewart.^[2] His best singles effort came when he made the third round at the 1982 Australian Open.^[2]

On the Grand Prix tennis circuit, Guan made one doubles final, at the 1979 Australian Hard Court Tennis Championships with Phil Davies.^[2] They lost to John James and Chris Kachel.^[2] He was a singles quarter-finalist at Brisbane's South Pacific Tennis Classic in 1981.^[2]

At an ATP Challenger tournament in Perth in 1982, Guan had a win over John Fitzgerald.^[2] He won five Challenger doubles titles during his career.^[2]

Result	W/L	Date	Tournament	Surface	Partner	Opponents	Score
Loss	0–1	Jan 1980	Hobart, Australia	Hard	Phil Davies	John James Chris Kachel	4–6, 4–6

No.	Year	Tournament	Surface	Partner	Opponents	Score
1.	1980	Cozenza, Italy	Clay	Ernie Ewert	Ismail El Shafei Ricardo Ycaza	7–6, 6–3
2.	1980	Messina, Italy	Clay	Ernie Ewert	Gianni Marchetti Enzo Vattuone	6–3, 6–4
3.	1981	Travemünde, West Germany	Clay	Wayne Hampson	Bruce Derlin David Mustard	6–3, 6–4
4.	1982	Solihull, Great Britain	Clay	Anand Amritraj	Andrew Jarrett Jonathan Smith	6–4, 3–6, 6–3
5.	1982	Cologne, West Germany	Clay	Warren Maher	Chris Johnstone Cliff Letcher	6–2, 6–4