The tennis world is awash with competing ratings and ranking systems to attempt to evaluate the standard of every player – from beginner to touring pro.

In my days as a tennis coach, one of the questions I’d often get asked was whether it was okay to wear ordinary trainers or sneakers on court. The answer was a resounding ‘No!’.

While most rules of the game have remained fairly consistent over the years, one aspect of tennis that seems forever under scrutiny is the tiebreak.