India's World Cup winning captain Mahendra Singh Dhoni has retired from Test cricket shortly after his team lost another overseas series, this time against Australia. Indian cricket authorities said Dhoni who is one of the world's highest-earning sportsmen has chosen to retire from Test Cricket with immediate effect in order to concentrate on the 50-over and Twenty20 formats of the game. 33-year-old Dhoni who is also the team's wicket-keeper, took over as Test skipper in 2008 after a spell captaining the one-day and T20 sides. Under his leadership India became the top ranked Test nation in 2009. But India have struggled when playing away from home in recent years. Dhoni was nevertheless India's most successful Test captain, winning 27 of the 60 Tests he led the national side in. Sunil Gavaskar said India will miss Dhoni in Test cricket. Former captain Bishan Bedi said Dhoni's decision to retire in the middle of a series left him perplexed, but the decision is his prerogative and he wished him a happy retirement. The announcement came just weeks before India is due to begin their defense of the 50-over World Cup trophy that Dhoni lifted on home soil in 2011.