With sports - football, cricket, ice hockey, boxing –
the key is to have two opponents which are well matched.
There is a chance, then of a 'good' game - with attacks on the defence,
surprise moves (both individually - with a player getting around his
mark with bluffs and feints - and as a team).
American Football has endless series of team moves
designed to outwit the opposition.
With athletics, the struggle may be one against another –
but also an assault on one's own personal best.
The strategies and ambiguities are different - watch next time with this
in mind,
and you will see the substructure.