FAST4 -- Tennis' answer to cricket's Twenty20

    Australian star Lleyton Hewitt fell to friend and rival Roger Federer during the debut exhibition match of FAST4 in Sydney.

    Story highlights

    • New, quicker format debuts in Sydney
    • Shorter matches, new time-saving rules and shorter changeover times promise to jazz up the sport

    (CNN)It might sound like a Vin Diesel movie, but tennis authorities in Australia are hoping that the FAST4 format, which debuted Monday with an exhibition match between world No. 2 Roger Federer and former Wimbledon and US Open champ Lleyton Hewitt, could "revolutionize" the sport.

    That contest ended in the Swiss star's favor, beating his old friend and rival 4-3 2-3 3-4 4-0 4-3 at Sydney's Qantas Credit Union Arena.
      This new version of tennis, which marks some of the most significant rule changes in the sport's history, consists of the best-of-three sets with quick changeovers and sudden-death playoffs to prevent tiebreaks from dragging on. The first player to four games wins the set.
        "Playing Roger in this new format will be an exciting challenge for both of us and a lot of fun," said Hewitt ahead of the match.
        "It's a fantastic innovation for tennis, and