and later scored in a 2–1 win over Odisha. During February 2019, he was sidelined with a finger injury, and missed the rest of the season. On 28 March 2019, Cahill announced his retirement from football. International career Western Samoa Although born in Sydney, Cahill had lived in Western Samoa for three years before returning to Australia as a child. The Football Federation Samoa invited Australia-based Cahill to play for the country at the 1994 OFC U-20 Championship. The competition winners would qualify for the 1995 FIFA World Youth Championship. Cahill made his debut for the under-20 team at the age of 14. He made his debut for Western Samoa in a 3–0 loss against New Zealand coming on as a substitute. He also played against Vanuatu in another 3–0 defeat. He played alongside his older brother Sean, who was a goalkeeper. His younger brother Chris later went on to captain the country at the top national team level. Change of allegiance In February 2002, Cahill received an offer to play for the Republic of Ireland at the 2002 FIFA World Cup by Mick McCarthy, his former manager at Millwall. Cahill has Irish grandparents and McCarthy had hoped that Cahill would be interested. However Cahill was not eligible as he was cap-tied to Samoa. FIFA changed its eligibility rules in 2003, allowing players capped at junior levels to switch international allegiance, meaning that Cahill was then able to play for England, Republic of Ireland, Australia or Samoa. He chose to represent the country of his birth, declaring it a "special moment". Australia Cahill made his debut for Australia in a friendly against South Africa on 30 March 2004 at Loftus Road, London. He then participated at the 2004 Olympic Games. 2004 OFC Nations Cup Cahill made his competitive debut for Australia at the 2004 OFC Nations Cup. Cahill finished the competition as second-highest scorer in the competition with six goals, and was the top scorer in the final round. Australia went on to win the competition for the fourth time in their history. Having won the competition, Australia were drawn against Uruguay in the World Cup qualification play-off. Cahill played in the game as Australia beat Uruguay after a penalty shoot out to qualify for the World Cup for the first time in over 30 years. 2004 Summer Olympics Cahill helped Australia reach the quarter final stage of the men's