How full is your Boston Celtics glass?

There are plenty of reasons to be bullish on this 2020-21 Celtics squad, which boasts a rapidly improving young core of Jayson Tatum, Jaylen Brown and Marcus Smart alongside experienced veterans Kemba Walker, Tristan Thompson and Jeff Teague.

There are also causes for concern, however: The versatile Gordon Hayward is off to the Charlotte Hornets, Walker is out until at least January with a knee that may not fully heal and Thompson and Teague are entering their 10th and 12th seasons, respectively.

We can't predict the future, but to get a sense of how this season might play out, we're laying out the best- and worst-case scenarios for Boston's top seven players during the 2020-21 NBA season. Read the worst-case scenarios at your own peril.

Best- and worst-case scenarios for the Celtics' key players in 2020-21