Read the paragraph.(1) Baseball is unique because it is the only sport in America that does not have a time clock—although tennis and softball are not timed, either. (2) Instead, games last for nine innings, unless there is a tie after the ninth, in which case they go extra innings. (3) Nine-inning games last an average of three hours. (4) Extra innings tack on time to an already long game, but the end is always the most exciting part. (5) Most people in the US watch baseball and are fans of their hometown team.
Sentence 1 says baseball is the only sport in America without a time clock, but then acknowledges that tennis and softball are not timed either. Those claims contradict each other, so sentence 1 is the flawed sentence.
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