Fast medium – Sometimes used interchangeably with medium fast, this refers to bowlers between 128 km and 140 km per hour on average.
Medium fast – Slower still, this is for bowlers who check in at between 112 km and 127 km per hour on average.
Saqlain Mushtaq was the inventor of the 'doosra' and he bowled it quite well-A 'googly' is a delivery that a leg spinner-
Is there any difference between two with shape of the balls or else. Explain it.