In 2010, following continued success on the junior circuit, Kubler was granted wildcards into the Brisbane International and Sydney International qualifying draws, but failed to win a match at either event. Kubler won through qualifying to make his main draw professional debut but lost in the first round to compatriot Marinko Matosevic. Kubler made his professional debut in September 2008 at the Australia F7 Futures event on the ITF Men's Circuit, the third tier for men's professional tennis. Professional career 2008–2013: Early career and injury concerns Kubler won six junior titles throughout his career and achieved the combined No.1 world ranking in May 2010 with a win–loss record of 67–17 in singles and 40–19 in doubles. Following his success at the Junior Davis Cup, Kubler won five titles in a row which saw his junior ranking rise to No. In 2009, Kubler became just the second player in history (after Rafael Nadal) to go undefeated through the World Youth Cup and Junior Davis Cup. Kubler grew up in the north Brisbane suburb of Mango Hill with an older brother and a younger sister.

His father, John, introduced Kubler to tennis at the age of five, but died of cancer when Kubler was eight years of age. Kubler was born in Brisbane, Australia to an Australian father and a Filipina mother. Kubler also spent four years of his professional career playing exclusively on clay courts to avoid further structural damage to his knees. The condition has plagued Kubler throughout his career, resulting in six knee surgeries. 1 ranking and comparisons to Rafael Nadal, Kubler has spent the majority of his professional career on the lower circuits due to a hereditary knee condition that results in weakened meniscus around the joints. ĭespite a promising junior career, which included the junior world No. Kubler's career highlight came at the 2023 Australian Open, where he won his first Grand Slam doubles title as a wildcard alongside compatriot Rinky Hijikata. 63 achieved on 24 April 2023 and a doubles ranking of No.

He has a career-high ATP singles ranking of No. Jason Murray Kubler ( / ˈ k uː b l ər/ KOOB-lər born ) is an Australian professional tennis player. 26–28 (48.1% in Grand Slam and ATP World Tour main draw matches, and in Davis Cup)ġ7–11 ( Grand Slam, ATP Tour level, and Davis Cup)

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