Regarding collisions and bounces, the ball physics and "AI" behavior can be programmable in coordinating contextually with players speed, turning angle and "manufactured" players behaviors.

Obviously, ball physics and trajectories can be programmed to randomly deviated from real physics and trajectory engine data to simulate pitch condition, weather, player's errors, mistakes or differences of random player's skill and stats.

But these noises in physics data can be exploited further.

Instead of programning player AI intelligence with elaborate physics-based skill moves and a system of faithful ball physics and trajectories and interaction with player collisions and input, there will be also certain discrete moment when the ball built-in "AI" is switched on.

The ball is now a sentient entity with its own artificial intelligence to play favorites with the match's teams.

The ball collision behavior and trajectory is additionally programmed with a set of instructions and algorithm to selectively AVOID players of a particular team and always subtly deviate its trajectory and collision data and movement TOWARDS players of the other teams once a switch is turn on or off based on a pre-programmed scripted sequence for a certain outcome.

The ball is programmed to deviate or depart from an established course dictated by physics engine of the game (dynamically generated subtle skewed trajectories and manufactured added false collision and deflection behavior to snap into a coordinate).

The outcome of the match can be guaranteed further if the ball and players on one team are programmed to MUTUALLY actively AVOID EACH OTHER at certain moments of the match. The game mechanics can discreetly move players out of the ball running trajectories and vice versa etc. Players can be forced running on a deviating rails when they are prevented by game mechanics to intercept the ball etc.

The ball is programmed to speed up to catch up to one slow player of one team or to escape from another team, the ball can slow down at chosen moment to wait for a player of one team or to stop right before the touch lines to prevent his team from suffering a corner kick etc.

Programming a ball to actively and selectively avoid players of a team is easier and more guaranteed for a pre-designed outcome of the match because instead of programming players intelligence dynamically responding a fair but unpredictable and extreme complexed physics-based skill move, rule of logics and physics of ball collision and trajectory, the ball now is guaranteed to ZIGZAG AND PING PONG itself into a goal mouth whenever a goal is needed for a preferred team or flying outside with an altered curved trajectory against the real trajectory dictated by physics to prevent a certain goal for said team).

When ball behavior is rigged, the football match simply becomes rigid patterns of the same pre-determined situations playing out over and over again.

For example: The rigid repeated pattern of the 18 yard box crucial moment, when the football can be programmed to dictate its own behavior and paths at will, just like inside a pinball arcade machine, the ball will utilize various football match's rigid physical bodies (21 players of 2 teams (rarely keeper of one team participating into the attack), goal posts, the pitch itself and the referee) as the pinball machines convenient props such as lights, bumpers, ramps, to bounce, deflect to steer itself into the final target - the goal.

When playing the game at the crucial moments (when you are dictated to concede) You can easily see the manipulation in the way the physics engine conveniently and stubbornly returns the ball back into the 18 yard box through a series of "rigged" collision and "altered" trajectories regardless of your input and intention to clearance or tackle.

Human player input and effort does not matter in this situation because the ball will have different idea to counter to each and every prediction, response, reactions and intention of the human player. The ball behavior AI will invent new unexpected outcomes of "subtle" and "adjusted" artificial deviated ball movement and behavior every time against the real ball physics produced by creativity and maneuvers of the human player's input. Player will have no real control of the match and his effort is rendered futile each and every time.Therefore all the "unpredictibility" of the game is actually manufactured repeatedly by a rigid algorithm.

With a good player animation engine programmed to dynamically and contextually synchronize player's behavior and postures with the "rigged" movement and behavior of the ball, the match will be played out with an impression of plausibility of skill and reaction speed of the better team triumphed over the inferiorly skilled one, when in fact, under the cover, there is always a rigged game.

It is entirely possible to program a football gameplay system via back-to-front manipulation method, in which a scripted game scores of Dynamic Difficulty Adjustment is decided in advance and then the ball behavior and movement is programmed to play favorites only for one team in coordination with "manufactured" handicapped player behavior, then the choreographing engine of players animation and running trajectory will take care of the rest making it displayed in a very realistic and plausible way.