The key to India's bowling in the 1970s were the Indian spin quartet – Bishen Bedi, E.A.S. Prasanna, BS Chandrasekhar and Srinivas Venkataraghavan. This period also saw the emergence of two of India's best ever batsmen, Sunil Gavaskar and Gundappa Viswanath. Indian pitches have had the tendency to support spin and the spin quartet exploited this to create collapses in opposing batting line-ups. These players were responsible for the back-to-back series wins in 1971 in the West Indies and in England, under the captaincy of Ajit Wadekar. Gavaskar scored 774 runs in the West Indian series while Dilip Sardesai's 112 played a big part in their one Test win.
If a fielder is injured or becomes ill during a match, a substitute is allowed to field instead of him, but the substitute cannot bowl or act as a captain. The substitute leaves the field when the injured player is fit to return. The Laws of Cricket were updated in 2017 to allow substitutes to act as wicket-keepers, a situation that first occurred when Mumbai Indians' wicket-keeper Ishan Kishan was injured in a match on 18 April 2018.
The game on the field is regulated by the two umpires, one of whom stands behind the wicket at the bowler's end, the other in a position called "square leg" which is about 15–20 metres away from the batsman on strike and in line with the popping crease on which he is taking guard. The umpires have several responsibilities including adjudication on whether a ball has been correctly bowled (i.e., not a no-ball or a wide); when a run is scored; whether a batsman is out (the fielding side must first appeal to the umpire, usually with the phrase "How's that?" or "Owzat?"); when intervals start and end; and the suitability of the pitch, field and weather for playing the game. The umpires are authorised to interrupt or even abandon a match due to circumstances likely to endanger the players, such as a damp pitch or deterioration of the light.
Since international teams started using different kits for T20s and ODIs, Nike released the first T20 kit for the team in 2016 with a similar shade and a contemporary design. Multiple thin strips of orange and green were included on upper right and lower left sides of the jersey respectively. A new ODI jersey was unveiled by Nike in 2017 with a similar shade of blue for the body and a darker shade of blue for the sleeves. The tricolour accent made a return to the uniform as a single thin strip on either sides of upper chest.
Subject to certain variations, on-field clothing generally includes a collared shirt with short or long sleeves; long trousers; woolen pullover (if needed); cricket cap (for fielding) or a safety helmet; and spiked shoes or boots to increase traction. The kit is traditionally all white and this remains the case in Test and first-class cricket but, in limited overs cricket, team colours are worn instead.
The captain is often the most experienced player in the team, certainly the most tactically astute, and can possess any of the main skillsets as a batsman, a bowler or a wicket-keeper. Within the Laws, the captain has certain responsibilities in terms of nominating his players to the umpires before the match and ensuring that his players conduct themselves "within the spirit and traditions of the game as well as within the Laws".
Cricket is a multi-faceted sport with multiple formats that can effectively be divided into first-class cricket, limited overs cricket and, historically, single wicket cricket. The highest standard is Test cricket (always written with a capital "T") which is in effect the international version of first-class cricket and is restricted to teams representing the twelve countries that are full members of the ICC (see above). Although the term "Test match" was not coined until much later, Test cricket is deemed to have begun with two matches between Australia and England in the 1876–77 Australian season; since 1882, most Test series between England and Australia have been played for a trophy known as The Ashes. The term "first-class", in general usage, is applied to top-level domestic cricket. Test matches are played over five days and first-class over three to four days; in all of these matches, the teams are allotted two innings each and the draw is a valid result.
In the approximate centre of the field is a rectangular pitch (see image, below) on which a wooden target called a wicket is sited at each end; the wickets are placed 22 yards (20 m) apart. The pitch is a flat surface 3 metres (9.8 ft) wide, with very short grass that tends to be worn away as the game progresses (cricket can also be played on artificial surfaces, notably matting). Each wicket is made of three wooden stumps topped by two bails.