As One Day International matches have a limited set of overs, batsmen try to score quickly. Scoring quickly means trying to score at least one run per ball bowled. Most batsmen manage to score at an average of four runs an over (i.e. four runs in the six ball over).
Before the ball reaches a batsman (left) the bat is held in
a high backlift, before stepping forward and swinging through for a forward
drive (right).
When a team goes out to bat, the best players bat first. The first three
batsmen (number 1, 2, 3) are known as the top order; the next four
(numbers 4, 5, 6 and possibly 7) form the middle order, and the last
four (numbers 8, 9, 10 and 11) are the lower order or tail.The specialist batsmen of a team usually bat near the top of the order, so as to score more runs. The openers or opening batsmen are the first two batsmen to take the crease. They are not necessarily the best batsmen, but are expected to negotiate the new ball and not lose wickets until the shine on the ball is considerably diminished (a hard and shiny ball bounces and swings more and is more difficult for the batsmen to face). In addition, they are supposed to play a quick innings (more runs in fewer balls), reflecting the fact that the fielding side is subject to restrictions on the placement of fielders in the first 15 overs which makes it easier to score runs. In a recent amendment to the rules of ODI cricket, fielding captains are given mandatory fielding restrictions for the first 10 overs and then two chunks of 5 overs each, also known as power-play overs, which they may impose at any stage of their choice within the stipulated 50 overs.
Following the openers is the No. 3 or one-drop batsman. His job is to take over from the openers and typically play a careful and prolonged innings, effectively tying up one end of the batting. This brings in some stability in the batting, as new batsmen find it difficult to settle down and it helps to have a settled batsman at the other end. The best batsman of the team is usually put at number 3 or 4, to protect him from the difficulties of batting against the best bowlers on a fresh pitch and to allow him to play a long innings.
The middle order is often considered the most valuable asset of a batting line-up in One-Day Internationals, because its members are responsible for consolidating the batting team's position through the middle part of the 50 overs. Characteristic of middle-order batting is the practice of taking many singles (or ones) and 'twos', with only the occasional boundary (a four or a six), as opposed to the more flamboyant openers who score primarily in boundaries. This is because the fielding restrictions on the opposition are lifted in the middle overs, so that the percentage of boundaries scored decreases. Middle-order batsmen are often chosen for the ability to run hard and fast between the wickets (to maximise the number of runs not scored from boundaries) and for their endurance and patience. The middle order typically sets the stage for an aggressive assault on the bowling in the final 10 overs of the match. To achieve this assault, two things are necessary - a number of hard-hitting batsmen yet to bat or not out and a number of wickets in hand (since aggression means a greater likelihood of losing wickets). The last 10 overs of a one-day cricket match innings is often the most exciting part of the innings, because of the large number of boundaries scored and wickets taken. During the last ten overs of an ODI, batsmen often use shots that are riskier than shots played at the beginning of the innings.
Examples of risky shots include the reverse sweep and the paddle-scoop. These shots are used to achieve a boundary which would not be possible when playing a safer, more orthodox shot. Finally, the lower order consists of the bowlers of the team, who are not known for their batting prowess and so bat as low down the order as possible.
However, there are no real restrictions to the batting positions. Captains have been known to experiment with the batting line-up to gain specific advantages. For example, a lower-order batsman is sometimes sent in at number 3 with instructions to pinch-hit (playing aggressively in an attempt to score more runs in fewer balls - a term borrowed from baseball) to score quick runs and shield better players, as his wicket (as a less accomplished lower-order batsman) is less valuable anyway.