They may often be the smallest players on the field but halfbacks are definitely the men in charge.
There have been some excellent no.9s across the decade but these are the men who've been at the top.
Who is your pick for the halfback in the Fans' World XV of the Decade (2010-2019)? Vote now.
Aaron Smith (New Zealand)
The first-choice halfback for the All Blacks throughout a largely dominant decade, Smith debuted in 2012 and won a World Cup in 2015. Passed Justin Marshall as the most capped All Black no.9 and has 87 Tests.
Conor Murray (Ireland)
Outstanding Irish halfback whose combination with Jonny Sexton saw the men in green climb to the top of the world. Also started for the British and Irish Lions in their 2017 series draw in New Zealand.
Will Genia (Australia)
Classy Wallabies no.9 who has consistently delivered for Australia in his 105 Tests, particularly in the 2015 World Cup. One of just 10 men to play over 100 Tests for the Wallabies.
Faf de Klerk (South Africa)
Tiny Springbok halfback with a shock of blond hair and a huge ticker, Fan de Klerk is a constant threat with the ball and a gutsy defender. One of the major reasons South African won the 2019 World Cup.
Mike Phillips (Wales)
One of the biggest halfbacks of the modern era, Phillips played like an extra forward but was also a very skilful and powerful athlete. Played 94 Tests for Wales and five for the Lions.
Ben Youngs (England)
Excellent all-round halfback who has more-often-than-not been at the heart of English victories across the last decade. Played 94 Tests for England and was a key man at the 2019 Rugby World Cup final.