Boris Becker hopes players do not turn into emotionless "computers and machines" following the ATP's warning that there will be stricter punishment for on-court misconduct in the wake of a spate of angry outbursts. Alexander 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, while Nick Kyrgios was fined for his outbursts at Indian Wells and Miami last month. Becker, who had many angry outbursts during his career, said the sport needed players to show emotion on court.