What is "knockdowns"

Usage examples of "knockdowns".

Sam Solomon, that had given him the early five-round edge in Las Vegas that Ali had refused to understand until he was so far behind that his only hope was a blazing last-minute assault and a knockout or at least a few knockdowns that he was too tired, in the end, to deliver.

This sort of performance went on for an hour or more, with the knockdowns and other casualities pretty evenly divided between the two.