The ball is a hard leather-seamed spheroid, with a circumference of 22.9 centimetres (9.0 in). The ball has a "seam": six rows of stitches attaching the leather shell of the ball to the string and cork interior. The seam on a new ball is prominent and helps the bowler propel it in a less predictable manner. During matches, the quality of the ball deteriorates to a point where it is no longer usable; during the course of this deterioration, its behaviour in flight will change and can influence the outcome of the match. Players will, therefore, attempt to modify the ball's behaviour by modifying its physical properties. Polishing the ball and wetting it with sweat or saliva is legal, even when the polishing is deliberately done on one side only to increase the ball's swing through the air, but the acts of rubbing other substances into the ball, scratching the surface or picking at the seam are illegal ball tampering.
Ganguly became the regular captain of the team in both Tests and ODIs in 2000. He remained captain until 2005–06 and became the then most successful Indian captain, winning 21 of his 49 Test matches in charge and 76 of his 146 ODIs. Under his captaincy, India became the joint-winners of the 2002 ICC Champions Trophy with Sri Lanka, and the runners-up of the 2003 Cricket World Cup. India lost only three Tests at home under Ganguly and managed to draw Test series in England and Australia. Rahul Dravid took over as Test captain in 2005. In 2006, he led India to its first Test series victory in the West Indies in more than 30 years.