The Boston Celtics ended their 2020-21 NBA season on a disappointing note, crashing out of the playoffs in the first round against the mighty Brooklyn Nets.The Celtics have made some major changes to their roster this offseason, with Brad Stevens stepping down from the head coach position and taking up a front-office job. With Ime Udoka replacing Stevens, the Boston Celtics will hope for a change in fortunes this campaign.With pre-season approaching, here's a look at the Boston Celtics' roster, key dates and schedule:Boston Celtics' roster for the 2021-22 NBA SeasonTeam USA Basketball Training SessionThe Boston Celtics enter the 2021-22 NBA season with the right blend of youth and experience.The Celtics will likely be heavily reliant on their young forward partnership of Jayson Tatum and Jaylen Brown. Meanwhile, their offseason acquisitions, Al Horford, Dennis Schroder,and Josh Richardson, are also expected to contribute significantly.Player NamePositionYears in NBAJabari ParkerForward7Grant WilliamsForward2Josh RichardsonGuard6Dennis SchroderGuard8Al HorfordCenter/Forward14Jaylen BrownForward/Guard5Enes KanterCenter10Payton PritchardGuard1Robert WilliamsCenter/Forward3Sam Hauser (two-way)ForwardRookieAaron NesmithGuard/Forward1Marcus SmartGuard7Jayson TatumForward4Bruno FernandoForward2Juancho HernangomezForward5Romeo LangfordGuard2Boston Celtics@celticsThere’s a long list of hyped up games on our 2021-22 schedule, but there’s also a long list of underrated games that you might've overlooked upon initial review too. nba.com/celtics/news/s…4:44 AM · Aug 21, 202126323There’s a long list of hyped up games on our 2021-22 schedule, but there’s also a long list of underrated games that you might've overlooked upon initial review too. nba.com/celtics/news/s…Key dates for Boston Celtics entering 2021-22 NBA seasonMedia Day: September 27th, 2021 - Monday.Training Camp Start Date: September 28th, 2021 - Tuesday.Season Opener: Boston Celtics vs New York Knicks (October 20th, 2021 - Tuesday, 7:30 PM ET).The Boston Celtics will open their season with a game against their Eastern Conference rivals and fellow playoff hopefuls, the New York Knicks.Boston Celtics preseason schedule and datesThe Boston Celtics will commence their preseason with a game against the Orlando Magic. They are expected to win that game even if they don't field their best players. That's because the Magic have an extremely young team who are likely to tank during the season.Boston Celtics@celticsA new season is right around the corner and new faces are getting ready to make their mark, including a new ball handler.nba.com/celtics/news/s…12:30 PM · Sep 24, 202136319A new season is right around the corner and new faces are getting ready to make their mark, including a new ball handler.nba.com/celtics/news/s…The Celtics will next play Nick Nurse's Toronto Raptors before they make a trip to the Amway Center. They'll round up their preseason with a game against Jimmy Butler and co. at the FTX Arena.Date and TimeMatchTVMonday, October 4th, 7:30 PM ETOrlando Magic vs Boston CelticsNBC Sports BostonSaturday, October 9th, 7:00 PM ETToronto Raptors vs Boston CelticsNBC Sports BostonWednesday, October 13th, 7:00 PM ETBoston Celtics vs Orlando MagicNBC Sports BostonFriday, October 15th, 7:30 PM ETBoston Celtics vs Miami HeatNBC Sports BostonThe Boston Celtics are expected to make a deep playoff run in the 2021-22 NBA campaign, but could face some strong competition in the Eastern Conference.Reigning champions Milwaukee Bucks remain a formidable team, while the Brooklyn Nets have arguably the best roster in the NBA at the moment. The Miami Heat have also consolidated well this summer and will look to bounce back from their playoff embarrassment last season.Considering the same, Celtics boss Ime Udoka will be under immense pressure to deliver from day one of the 2021-22 NBA season.