As is customary, nobody is quite sure what Nick Kyrgios will bring to the court at this year's US Open, but having recovered from injury, it should entertaining.
The fiery Australian has been involved in a succession of controversial incidents during his turbulent career, but finally appears to be fulfilling his potential having claimed his first three ATP tour titles last year.
The 22-year-old won in Marseille in February to make his breakthrough and added titles in Atlanta and Tokyo later in the year to underline his undoubted talent.
Kyrgios does have two career Grand Slam quarter-finals on his CV, including Wimbledon in 2014 and Melbourne in 2015. He's already made the quarter-finals in Indian Wells, and has drawn confidence from his wins over Novak Djokovic earlier in the season, as well as his three-set epic with Roger Federer in the Miami semi-finals.
Hip problems have seriously hampered Kyrgios this year, causing him to withdraw from first round matches at Queen's, Wimbledon and Washington.
He has recovered to play in Cincinnati and will cause a spark in New York in a couple of weeks time, one way or the other.