FootballA second ball is the loose ball available after an initial aerial contest, clearance, save, or deflection. Winning the first challenge does not necessarily secure possession: the next touch may decide who can attack.
What to watch
Watch the players around the initial contest. One may challenge while teammates position themselves in front, behind, or to either side to collect the loose ball. A compact supporting shape makes more outcomes reachable.
An illustrative example
After a long clearance, the striker contests the header and a midfielder collects the knockdown. Record the header and the recovery separately. Calling every rebound a planned second-ball win overstates what the sequence shows.
Avoid this mistake
Do not count second balls without defining which situations qualify. Providers and analysts can use different event definitions.