Fouls (II.E): It is the responsibility of all players to avoid contact in every way possible .
Avoid contact in every way reasonable possible, while still playing Ultimate. Some contact is inevitable, but players have an affirmative obligation to make reasonable efforts to avoid contact.
If a player contacts an opponent while the disc is in the air and thereby interferes with that opponent's attempt to make a play on the disc , that player has committed a receiving foul. Some amount of incidental contact before, during, or immediately after the attempt often is unavoidable and is not a foul.
The opponent must at least begin an attempt to make a play on the disc. The opponent’s "attempt to make a play on the disc" includes any second efforts after a disc is tipped, if the disc has not become uncatchable.Incidental contact, by definition, is not a foul.
If a player contacts an opponent while the disc is in the air and thereby interferes with that opponent's attempt to make a play on the disc, that player has committed a receiving foul. Some amount of incidental contact before, during, or immediately after the attempt often is unavoidable and is not a foul.
The opponent must at least begin an attempt to make a play on the disc. The opponent's "attempt to make a play on the disc" includes any second efforts after a disc is tipped, if the disc has not become uncatchable. Incidental contact, by definition, is not a foul.