In cricket, an opener or an opening batsman is the batsman who "opens" the innings. It is considered an important position in the batting order for several reasons:
In First-class cricket, the opener's duties are primarily to take the 'shine' off the new ball, thus reducing its ability to move through the air after being bowled; this protects the rest of the batting line-up from facing the moving ball. Openers thus traditionally have been less fluent stroke-players, but technically more circumspect, than the specialist batsmen to follow. An example of a classic opener in this mould was Geoffrey Boycott.
In One-day cricket, however, the introduction of field restrictions in the early 1990s led to a redefinition of the openers role. To take advantage of the field restrictions, some teams - notably Martin Crowe's New Zealand team in the 1992 World Cup, took to promoting pinch-hitters up the order - in this case, Mark Greatbatch. After Sanath Jayasuriya and Romesh Kaluwitharana destroyed bowling attacks in the 1996 World Cup through aggressive batting in the first 15 overs, the position of one-day opener began to be regarded as one reserved for individuals capable of clean hitting against fast bowling.