Consider the question. Premise: "A tennis player about to hit the ball."
Hypothesis: "The player is playing doubles on an indoor court."
Do we know that the hypothesis entailed by the premise?
 What is the step-by-step reasoning process to arrive at the answer: it is not possible to tell?
The player could be playing in a singles match and is not necessarily playing doubles. The man could be playing on an outdoor court instead of an indoor court.