Mathew Leckie

In August 2009, Leckie was selected to represent Australia in the AFF U19 Youth Championship 2009, where he opened up the score-sheet in the 4–1 win over hosts, Vietnam, in the semi-finals. Mathew was called up to the Australian Under-19s for the 2010 AFC U-19 Championship.

Leckie scored the winning goal in his first AFC Champions League match on 24 February 2010, against the reigning champions Pohang Steelers at Hindmarsh Stadium. He followed this up by scoring his second goal in as many games against Shandong Luneng in Adelaide's 2–0 win on Match Day 2 of the Champions League. Leckie is considered to be one of Australia's best young players.

Leckie started the 2010–11 season with a bang, scoring twice in Adelaide's first five games, earning wide praise for his entertaining and robust style of play and winning the favour of the Australian U19 side for their competing in the 2010 AFC Under-19 championships.

At the end of the A-League season he signed for German side Borussia Mönchengladbach. He scored his first goals for his new club with a double in a 5–2 friendly win against Aberdeen on 9 July 2011. In early 2013, he was loaned out to Frankfurt and has since scored 3 goals in only 2 appearances for the reserve team.

Ex-Australian national coach Holger Osieck included Leckie in the squad for the international friendly against the Republic of Korea on 14 November 2012. Leckie came on as a late substitution with only limited time on the ball.

On 3 June 2013, Leckie made his loan move to FSV Frankfurt permanent, signing a three-year contract that runs till 2016. Mathew stated the move was made to maximise his personal development and to build on the successes of his first season spent at FSV on loan where he made 28 appearances and scored 4 goals.

Australian National Coach, Ange Postecoglou, included Leckie in the squad for the international friendly against Costa Rica on 19 November 2013.

On 7 May 2014, he signed a three-year contract with FC Ingolstadt 04. While playing for Ingolstadt, the club was promoted to the Bundesliga at the end of the 2014–15 season. in the 2015–16 Bundesliga season Leckie scored a goal against FC Augsburg, which was one of three goals he scored that season and one of the seasons best goals.

On 3 September 2015, Leckie scored his second goal for Australia, and his first since 2013, opening the scoring against Bangladesh in a 2018 FIFA World Cup qualifier. On 5 September 2017, Leckie scored his 6th international goal for Australia against Thailand.

On 22 May 2017, it was announced that Leckie had signed for Hertha BSC for the 2017–18 season. He began his spell positively, appearing in many pre-season matches and assisting two goals in his first competitive appearance for the club in the first round of the DFB Pokal against Hansa Rostock. Leckie scored two goals on his debut for Hertha BSC on matchday one of the 2017–18 Bundesliga season against VfB Stuttgart in a 2–0 home victory. After the game Leckie said: "It's probably one of the best weeks of my life, so I'm definitely a happy guy at the moment."

Leckie scored his first European goal in a 3–2 away defeat to Athletic Bilbao in the 2017–18 Europa League on 23 November 2017.

Leckie took part in Australia's hopes of success in the 2017 Confederations Cup after the squad was announced in May 2017. He started the first two group matches and came on as a Substitute in the last group match in the 57th minute against Chile.

In May 2018 he was named in Australia's 23-man squad for the 2018 FIFA World Cup in Russia.