2014 has been Marin Cilic 's most successful year . He won the Australian Open, and then he went on to win Wimbledon in a record time of just under two hours. Croatian has had to wrestle back credibility following failed doping test in April 2013 . Big server says his time out of the game has contributed to his fantastic year .
2014 has been Marin Cilic 's most successful year . 26-year-old won four titles , including first major grand slam , the U.S. Open , in September . Croatian has had to wrestle back credibility following failed doping test in April 2013 . Big server says his time out of the game has contributed to his fantastic year .