He was twice a runner-up in the boys' doubles at Grand Slams, in the 1986 Wimbledon Championships with Hubert Karrasch and partnering Bryan Roe in the 1987 Australian Open.

[2] In the 1987 Australian Open, Barr also participated in the men's draw and beat countryman Darren Cahill in the first round (his only Grand Slam singles win), before being knocked out of the tournament by Tim Wilkison.

The Australian twice made the second round of the men's doubles at his home event, with Kim Warwick in 1988 and Neil Borwick two years later.

[3] His other big win came when he beat Yugoslavian Slobodan Živojinović en route to a quarter-final appearance in the 1989 Queensland Open.

[3] He only narrowly missed out on a spot in the semi-finals, losing his quarter-final match to Niclas Kroon in a third set tiebreak.