With only nine fielders (in addition to the bowler and wicket-keeper),...
wikipedia - 22 Oct 2020With only nine fielders (in addition to the bowler and wicket-keeper), there are not enough to cover every part of the field simultaneously. The captain of the fielding team must decide which fielding positions to use, and which to leave vacant. The placement of fielders is one of the major tactical considerations for the fielding captain.