Alun began playing tennis at seven and turned pro in 2000. Consistently dominant on the domestic pro circuit, he won two ATP Challenger titles and nine Futures in singles, and a further 10 Futures doubles titles.
In 2007, Alun had his best year in singles since turning pro, and consequently received a wildcard into the 2007 US Open, where he pushed second seed Rafael Nadal to four sets in the first round.
At Australian Open 2008 he defeated world No.45 Albert Montanes in four sets to advance to the second round and achieve his best Grand Slam result.
Following that he was selected in the Australian Davis Cup team for the first time, winning his only singles rubber against Tsung-Hua Yang of Chinese Taipei.
Alun’s highest singles ranking was No.123 (August 2007) and in doubles No.149 (April 2003).
Off court, he played the role of Tom Cavendish in the movie Wimbledon.
After retiring from the Tour, he married his partner, Jill, in June 2008, and runs a tennis academy with good friend Damien Ward at the National Sports Club Lyneham, Canberra. He has a young boy named Robbie.