Corruption in cricket

Cricket's biggest match-fixing scandal was unearthed in 2000, when Hansie Cronje admitted he had accepted money to throw matches. Soon players from other countries were implicated, among them Mohammad Azharuddin and Saleem Malik. Since then, allegations of fixing - including the new phenomenon of spot-fixing - have cropped up sporadically, and it has been acknowledged that bookmakers and the underworld have been active in trying to influence cricket results and specific moments in play. In 2010, scandal reared its head again when three leading Pakistan players were questioned by Scotland Yard and suspended by the ICC over spot-fixing charges.

Jun 15, 2018: Why corruption is a problem too large for cricket to solve itself  | Nov 8, 2017: Irfan to testify against Shahzaib on PCB's behalf

Cricket rules

Cricket has never stopped evolving: from round-arm bowling becoming the standard, to the 15-degree rule for arm flexion while bowling. From the number of balls per over to the specifications of equipment - ranging from glove-webbing to bat handles - almost every aspect of the game is regulated. New rules are frequently put in place - especially in the shorter forms of the game, as in the case of Powerplays, free hits, and the tweaking of field restrictions.

May 26, 2018: Four things next week's ICC meeting should look to address | Dec 24, 2017: Why Australia ought to have made it to the Champions Trophy semis

Sledging

From WG Grace, with his penchant for delivering a running commentary on opposition players and umpires, to Steve Waugh's Australians and their tactic of "mental disintegration", sledging is almost as old as cricket itself. The Australians, from Dennis Lillee to Merv Hughes have been the acknowledged masters, but Asian exponents like Kumar Sangakkara are fast catching up

Apr 6, 2018: The brawlers | May 26, 2018: Four things next week's ICC meeting should look to address

Ball-tampering

Players are barred, by Law 42.3, from rubbing the ball on the ground, interfering with its seam or surface, or using any implement that can alter the condition of the ball to thereby gain unfair advantage. There have been plenty of ugly incidents centring on accusations of ball-tampering through cricket's history: the John Lever "Vaseline" affair in 1976-77; the times England and New Zealand accused Pakistan of it in the early 1990s; Michael Atherton's admission that he used dirt to treat the ball against South Africa in 1994; and perhaps most infamously, the Oval Test of 2006 when Pakistan forfeited the match because they were accused of having tampered with the ball.

Apr 5, 2018: 'Smith will bounce back' - Vaughan | Aug 7, 2018: Many factors made ball-tampering reach 'tipping point' - Ponting

Pitches

Over the years the endeavour has been to take pitches out of the equation for ODIs and Twenty20s, by making them flat and uniform, so that the toss does not play a crucial part in the shorter format. In Tests, though, the preparation of the pitch and its durability are much more significant, impacting the result and duration of the game. Quite naturally pitches and their preparation in the longer forms of the game evoke a lot of comment and often controversy.

Jan 30, 2018: Nine deadly pitches | May 26, 2017: Hard, flat and true

Drugs

Shane Warne's one-year ban for the use of a diuretic in 2003 was the first reported instance in cricket of the use of performance-enhancing drugs (as opposed to recreational ones, a la Ian Botham, and various Pakistani and South African cricketers down the years). In 2006 Shoaib Akhtar and Mohammad Asif were found guilty of using the banned steroid nandrolone

Jun 3, 2017: 'ICC should have had blood-testing long ago' | May 7, 2014: Kashif Siddiq banned for failing dope test