Methods and apparatus of multiple sidelink transmission opportunities in one slot are disclosed. The method includes determining candidate starting positions for sidelink transmission in a first slot, each candidate starting position of the plurality of candidate starting positions indicating a different symbol within the first slot, performing, prior to a first candidate starting position, a first channel access procedure for the first candidate starting position and, in response to the first channel access procedure failing, performing, prior to a second candidate starting position, a second channel access procedure for the second candidate starting position, where the second candidate starting position indicates a symbol that is later than a symbol indicated by the first candidate starting position within the first slot.