Umpire spats – A grand slam winner and former world No. 1, Roddick frequently had spats with umpires during his career.
Is tennis too straight faced? – Andy Roddick has warned tennis is in danger of losing its personality.
Hawk-Eye – Now Roddick, who retired in 2012, wants to scrap tennis technology aid Hawk-Eye or severely alter the system currently in place in a bid to inject more personality in tennis.
Instant replay system – Hawk-Eye is an instant replay system used to determine whether the ball is in or out.
Whole new ball game – Hawk-Eye was first introduced at a top-level tennis tournament late in 2005.
Tracking balls – Hawk-Eye also provides ball-tracking systems for cricket and football.
Late adopter – In football, the Hawk-Eye system uses seven different cameras to track the ball and determine whether it has crossed the line, but it's only in recent years the sport has embraced the greater use of technology to help referees.
Impetus for change – It was only after the 2010 World Cup that football's world governing body FIFA recognized the need for change. Here Manuel Neuer of Germany watches the ball bounce over the line from a shot that hit the crossbar from Frank Lampard of England, but referee Jorge Larrionda did not award a goal.
'Super Brat' – "We love our guys in the game now, Roger, Rafa and the way they carry themselves but there's some entertainment value on the guys that don't carry themselves so well," Roddick said, mentioning himself, retired two-time grand slam winner Marat Safin and the man dubbed "Super Brat," John McEnroe.