Former England captain Alastair Cook has called for a change in Test cricket regulations, suggesting that teams should be allowed to take the new ball at any point within 160 overs. Under the current rules in the longest format of the game, a team can only opt for a new ball after 80 overs have been bowled. 

"A new rule I would add would be, how about, in 160 overs, you can take the new ball whenever you want? You have got two new balls for those 160 overs, and you can take that second ball whenever you want. You could take one after 30 overs if you wanted to," he said on the `Stick to Cricket` podcast.

Cook, who announced his retirement from international cricket in 2018, also said that the change would be flexible and would add tactical depth to the format.