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Sydney, Australia (Sports Network) - ATP executive chairman and president Brad Drewett died Friday after losing his battle with Motor Neurone Disease (also known as ALS or Lou Gehrig's Disease).

The 54-year-old passed away at his home in Sydney, Australia.

In January of this year, Drewett, who assumed his posts in January of 2012, announced he would continue in his roles on an interim basis until the ATP Board of Directors found his successor.

"Our thoughts are with Brad's family on this extremely sad day for them, the ATP and the entire international tennis community. He will be sorely missed by all," the ATP announced in a statement.

Drewett had been part of the ATP for more than 35 years, as a player, ATP Player Council member, ATP Player Board member, as CEO of the International Region, tournament director of the ATP World Tour Finals, and most recently as the executive chairman and president. He was a former top-40 singles and top-20 doubles player.

The ATP parted ways with former chief executive Adam Helfant at the end of 2011.