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.
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Similar to the first-class kits, BCCI logo is placed on the left chest while the logo of the kit manufacturer (Nike) sits on the right chest. The official team sponsor's logo (currently BYJU'S) is present on the central part of the jersey usually above 'INDIA' text as well as the sleeve of the players' leading arms. For T20 kits, in addition to these, the sponsor's logo is also present on the back, below the players' numbers. However, for ICC tournaments, the tournament logo is placed on the right chest and the sponsor's logo is allowed only on the sleeve of the players' leading arms. The kit manufacturer's logo in such cases will be printed on the sleeve of the players' non-leading arms. The name and jersey number of the players are printed on the back.
The next year saw mixed results in Tests for India: they lost away series in both South Africa and England, but won their away series against Australia, the first time they had won a series there. In home Tests, they defeated West Indies. They won the ODI leg of the South African tour, followed by the tri-series with Sri Lanka and Bangladesh. They lost 2–1 in the ODI series in England, followed by a win at home to West Indies and away to both Australia and New Zealand. At the start of 2019, Australia won a T20I series 2–0, representing Virat Kohli's first home defeat in a T20I series.
Eden Gardens in Kolkata has hosted the most Tests, and also has the second-largest seating capacity of any cricket stadium in the world, being capable of holding more than 66,000 spectators. Founded in 1864, it is one of the most historical stadiums in India, having hosted numerous historical and controversial matches. Other major stadiums in India include the Feroz Shah Kotla Ground, which was established in 1883 and hosted memorable matches including Anil Kumble's ten wickets in an innings haul against Pakistan. For the last two years, the ground has been undergoing renovation.