Can a boxer be saved by the bell?

No. Under regulation 27(6)(b)(xiii) of the Boxing Regulations, if a boxer is knocked down and the bell sounds while the referee is counting, the referee keeps counting until either the boxer rises or the count reaches "out", in any round. The timekeeper is also forbidden from sounding the end of a round while a boxer is being counted out (regulation 29(2)).

A punch that lands at the same moment as the bell counts as a legal blow; if it puts a boxer down, the referee counts as normal, and the following one-minute rest is not shortened (regulation 35(16)). A punch thrown after the bell is treated as a foul.