1999–2003 Sirianni earned a wildcard into the main draw of the
1999 Australian Open Men's Singles Draw. While he lost in the first round to
Mariano Zabaleta, the match went into a fifth set. Eventually, Zabaleta won 3–6, 6–4, 6–3, 4–6, 6–2. At the
2000 Australian Open, Sirianni lost in the first round to
Franco Squillari 6–3, 6–2, 6–1. His best
Australian Open result and first
ATP match won came at the
2003 Australian Open. In the first round, Sirianni defeated
Max Mirnyi 6–4, 6–4, 6–3. He lost in the second round to
Mikhail Youzhny, who was the twenty-fifth seed, 6–2, 6–3, 6–3.
2008 Australian Open campaign Aged 32, Sirianni kicked off his
Australian Open campaign with the wildcard playoffs. The 16 player round-robin style tournament consisted of 4 groups. Sirianni was placed within the likes of
Colin Ebelthite,
Andrew Coelho and
Greg Jones. Sirianni topped the group without dropping a set, and he booked a semifinal match against
Brydan Klein. Sirianni continued his run with a 6–4, 6–3 win, seeing him through to the final against
Adam Feeney. Sirianni defeated Feeney 6–3, 4–6, 6–3, 6–4, earning Sirianni a wildcard into the
2008 Australian Open. Joe was drawn against Serbia's
Janko Tipsarević in the first round of the
2008 Australian Open. Tipsarevic ranked No.47 in the
ATP rankings was roughly 100 places higher than Sirianni. Joe pushed the Serb to five sets but eventually lost 5–7 2–6 7–6(6) 6–0 0–6.
Sirianni's run in 2008 AO Series Sirianni also competed for a spot in the main draw of the
2008 Next Generation Adelaide International wildcard playoffs. Sirianni was seeded number two in the 8-player knockout-style tournament. Sirianni again defeated Andrew Coehlo and Greg Jones, thus qualifying for the final. Sirianni upset
Alun Jones, the top seed, 4–6, 6–3, [10–5], in a match tiebreak. Siranni therefore earned a wildcard to the
Adelaide tournament. Prior to Adelaide, Sirianni had only won one
ATP match when he entered the tournament. Sirianni was a regular on the
Challenger tour who had come off from back-to-back title wins in
Caloundra and
Brisbane with 15 wins out of 16 matches. Sirianni's first round match was against Adelaide's fifth seed, who was the injured world number 30
Radek Štěpánek. Sirianni led 7–6 (3), 4–3, before Stepanek retired. Taking his second ATP win, Joseph met
Sam Querrey in the second round, where Sirianni recorded a maiden ATP quarter final with a 6–7(5), 6–2, 6–3 win. In the quarter-finals Sirianni met second seed and world No. 25
Paul-Henri Mathieu of France. Joseph prevailed in a tight third set tie-break to win 1–6 6–1 7–6(6) and book a place in the semi-finals. Sirianni's fairytale run ended succumbing against Michaël Llodra 6–3, 7–6(8). However, Sirianni's efforts earned him a special entry to the
Medibank International and heralded the nickname 'Aussie Joe'. Sirianni was unable to continue his run, succumbing against qualifier Steve Darcis 1–6, 6–7(4).
After 2008 AO Series Sirianni raising his ranking maintaining around the 150 mark was able to make the cut for most
ATP Tournament Qualifying draws often being seeded. Playing in his first ATP main draw after the Australian Open Joe went through qualifying in the
2008 Dubai Tennis Championships. Sirianni was inconsistent on the Challenger circuit and went through qualifying in the
2008 Queen's Club Championships. He won his first round match against British wild card
Alex Bogdanović 6–3 6–3.
2009 Australian Open Sirianni failed to qualify for the Singles event at the
2009 Australian Open. In the Doubles event, he and partner
Andrew Coelho made it through to Round 3.
Post-career In 2012, Sirianni joined
Ana Ivanovic's team as a hitting partner. ==ATP titles==