ATP Challenger Tour Finals
The ATP Challenger Tour Finals was a tennis tournament played between 2011 and 2015 at the end of season, involving the top seven players in that year's ATP Challenger Tour, plus an invited player from the tournament's host country. Wikipedia
Prize money: US$220,000
Surface: Hard court (indoors) (2011–2012); Clay court (outdoors) (2013); Clay court (indoors) (2014–2015)