Mohammad Mustafa Amini (born 20 April 1993) is an Australian football (soccer) player currently playing for Borussia Dortmund in the Bundesliga. He was signed from the AIS team which played in the 2009-10 Youth League season. Amini has been earmarked by Young Socceroos head coach Jan Versleijen as one of the local game's brighter products.

Central Coast Mariners

Amini played for Blacktown City before being signed to an AIS scholarship. He was signed by the Central Coast Mariners on a two-year contract in the A-League. Amini made his debut for the senior team in a friendly against fellow Gosford club Central Coast Lightning in the which the Mariners won 7–1. Amini made his official A-League debut for the Mariners in a match against Brisbane Roar on 20 October 2010. His first goal came in a 3–1 away win against Gold Coast United on 9 February 2011.

Amini's excellent form throughout the 2010–11 A-League season attracted major interest from overseas clubs Borussia Dortmund and Bayern Munich. Subsequently it was announced that Amini was to spend two weeks on trial with Borussia Dortmund in preparation for the 2011 FIFA U-20 World Cup in July with a view of signing a long term deal with the Bundesliga club. Only days into his trial Borussia Dortmund publicly announced that the youngster had caught the eye of first team manager Jürgen Klopp stating that "he can definitely play football and is a really great talent.".

Borussia Dortmund

Loan to Central Coast Mariners (2011–12 season)
On 4 July 2011, it was announced that he had signed with Bundesliga club Borussia Dortmund on a four-year contract. However, Amini would initially be loaned to Central Coast Mariners until 31 May 2012, making him eligible to play for the club during the 2011–12 A-League season as well as the group stage of the Asian Champions League.

On 11 July 2012, Amini made his debut for Borussia Dortmund in a friendly against SV Meppen, scoring a goal in the 63rd minute en route a 2–1 victory for Dortmund.