Boris Becker urges ATP to let temperamental tennis stars continue to behave how they want

A clampdown on misconduct in the wake of recent on-court outbursts from Nick Kyrgios and Alexander Zverev is raising fears players will become emotionless «computers and machines».

Former world number one Boris Becker said tennis needed players who wear their hearts on their sleeve in response to the ATP's warning that there will be stricter punishment for on-court misconduct.

Kyrgios was fined for his outbursts at Indian Wells and Miami last month while Zverev was thrown out of a tournament in Acapulco in February after smashing his racket against the umpire's chair during an expletive-laden tirade.

Becker — who is currently facing possible prison time in the UK — had many angry outbursts during his career said the sport needed players to show emotion on court.

«I'm quite happy that we were allowed to play and ultimately go berserk under the exclusion of the social media and the microphones, so to speak,» he told Eurosport Germany.

«It's more difficult for the players today. Everything is extremely transparent, too transparent for my taste. 

»Tennis is also an entertainment sport. 

«Emotions are good, a bit of blood, sweat and tears, that stimulates, that was already the case with us. But everything has a limit.»

The ATP said it was also reviewing its guidelines to clamp down on repeat offenders after coming under fire for being «soft» on incidents of misconduct. 

The ATP warns players it will take a stricter line with on-court misconduct, as the men's tennis governing body reviews the Code of Conduct and penalties for blow-ups like those of Nick Kyrgios and Alexander Zverev.

While some players have called out their fellow professionals over their behaviour, Becker said everyone has to «look in the mirror».

«We're all not perfect,