Answer by taking a quote from the following article:

Yuvraj Singh ( pronunciation ) (born 12 December 1981) is an Indian international cricketer, who plays all forms of the game. An all-rounder who bats left-handed in the middle order and bowls slow left-arm orthodox, Yuvraj is the son of former Indian fast bowler and Punjabi actor Yograj Singh. Yuvraj has been a member of the Indian cricket team in ODIs since October 2000 and played his first Test match in October 2003.

Yuvraj was the icon player and captain for Indian Premier League (IPL) team Kings XI Punjab in the first two seasons; in 2010, the third season, icon player status was discontinued and the captaincy given to Kumar Sangakkara. They came second in the round-robin phase of the tournament, but lost their semi-final to the Chennai Super Kings. On 1 May 2009, Yuvraj registered his first hat-trick in T20 cricket against Royal Challengers Bangalore at Kingsmead in Durban, the same ground where he hit his six sixes. He dismissed Robin Uthappa, Mark Boucher and Jacques Kallis. On 17 May 2009, Yuvraj took his second Twenty20 hat-trick against Deccan Chargers at the Wanderers Stadium in Johannesburg. Yuvraj dismissed Herschelle Gibbs, Andrew Symonds and Venugopal Rao.  The Pune Warriors were a new team introduced for the 2011 IPL. Yuvraj Singh was bought by the team and chosen as captain. Pune Warriors finished ninth, ahead of only the Delhi Daredevils. From 14 matches, Yuvraj scored 343 runs at an average of 34.30, including two half-centuries. After much controversy BCCI had allowed Pune Warriors to have his replacement for 2012 Indian Premier League, citing his medical condition and nonavailability for 2012 IPL due to the same.  In 2014, Yuvraj was bought by the Royal Challengers Bangalore for 14 crore. Kingfisher employee union sent a letter to Yuvraj requesting him not to play for Royal Challengers Bangalore. In 2015, he was bought by Delhi Daredevils for a mammoth Rs. 16 Crores  In the 2016 IPL auction he was bought by Sunrisers Hyderabad for Rs. 7 crores. In 2016, he had a very successful IPL campaign with the Sunrisers Hyderabad after winning the 2016 Indian Premier League, he also put a strong performance in the final after scoring 38 runs from 23 balls.

Was there any controversy regarding this?
In 2015, he was bought by Delhi Daredevils for a mammoth Rs. 16 Crores