The ECB revealed changes to the planned 100-ball cricket regulations in February 2019. Instead, the tournament will consist of ten ten-ball overs, with a change of ends every ten balls. A bowler will deliver five or ten balls in a row. This will be followed by another bowler taking over and so on until all ten overs have been completed. The new rules come into effect for the start of the 2020 season. They were proposed after several players reported fatigue problems during the 2018 ICC Cricket World Cup. The new regulation was designed to avoid such issues by giving cricketers more time off between deliveries. However, some commentators have suggested it could open up the game even more, as batsmen can spend more time in the middle avoiding the ball. In order to keep scores down, captains will now have the option of agreeing to use no more than three fielders per side outside the off stump. Previously, they had been allowed four fielders per side outside the off stump. The new regulations also include changes to the way penalties are applied. If a bowler misses too many balls, then he is sent back to the sheds. Once he has been re-engaged, he is free to continue with the over. Previously, if a bowler missed too many balls, then he would be dismissed and a replacement brought in.