The Tennis 101 part might be using a tennis lesson as an analogy for life lessons or challenges. "0 Top" could be a typo for "Top 10" or "Top Zero", but that doesn't make sense. Maybe it's "0 Top" as in starting at zero, or "Tennis 101 for the Top 0" – but that's unclear. Alternatively, maybe "101" is a course code for an introduction to tennis, which is common in academic settings.