How many tennis balls per match?
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For a ball Machine, it does not change the kind of ball you would use if you were playing a tennis match. If you are a keen tennis player (plays more than 3/4 times per week) i wouldrecommend to buy Head ATP or any Slazenger but if you are just a typical player any unpressurised ball can be used with success.
Golfers on average lose 5 balls per round How many golf balls an average will a golfer lose playing one round every day for an year?
Very little in manufacture or specifications. Match balls are often a higher quality (around $30 per ball as opposed to $5 each) and are used for only two or three matches before being used as another practise ball. They are also less ranging in colour, as white is almost the only colour used for matches.
Under IRB Rules match balls at the start of the game must be; "65.71-68.75 kilopascals, or 0.67-0.70 kilograms per square centimetre, or 9.5-10.0 lbs per square inch", where the balls length in line 280 - 300 millimetres circumference (end to end) 740 - 770 millimetres circumference (in width) 580 - 620 millimetres