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.
The game underwent major development in the 18th century to become England's national sport. Its success was underwritten by the twin necessities of patronage and betting. Cricket was prominent in London as early as 1707 and, in the middle years of the century, large crowds flocked to matches on the Artillery Ground in Finsbury. The single wicket form of the sport attracted huge crowds and wagers to match, its popularity peaking in the 1748 season. Bowling underwent an evolution around 1760 when bowlers began to pitch the ball instead of rolling or skimming it towards the batsman. This caused a revolution in bat design because, to deal with the bouncing ball, it was necessary to introduce the modern straight bat in place of the old "hockey stick" shape.
India has had six regular Test captains since Mohammad Azharuddin took charge in 1989. Azharuddin led the team in 47 Test matches from 1989–90 to 1998–99, winning 14, and in 174 ODIs, winning 90. He was followed by Sachin Tendulkar, who captained the team in 25 Test matches and 73 ODIs in the late 1990s; Tendulkar was relatively unsuccessful as a captain, winning only 4 Test matches and 23 ODIs. He was replaced as ODI captain by Ajay Jadeja and then by Sourav Ganguly.
During the 1980s, India developed a more attack-minded batting line-up with stroke makers such as the wristy Mohammed Azharuddin, Dilip Vengsarkar and all-rounders Kapil Dev and Ravi Shastri. India won the Cricket World Cup in 1983, defeating the favourites and the two-time defending champions West Indies in the final at Lords, owing to a strong bowling performance. In spite of this, the team performed poorly in the Test arena, including 28 consecutive Test matches without a victory. In 1984, India won the Asia Cup and in 1985, won the World Championship of Cricket in Australia. Apart from this, India remained a weak team outside the Indian subcontinent. India's Test series victory in 1986 against England remained the last Test series win by India outside the subcontinent for the next 19 years. The 1980s saw Gavaskar and Kapil Dev (India's best all-rounder to date) at the pinnacle of their careers. Gavaskar made a Test record 34 centuries as he became the first man to reach the 10,000 run mark. Kapil Dev later became the highest wicket-taker in Test cricket with 434 wickets. The period was also marked by an unstable leadership, with Gavaskar and Kapil exchanging the captaincy several times.