4 Knicks observations from opening night to keep an eye on this seasonRandle-Toppin lineup, Barrett's defense, and more10/21/2021, 3:23 PMDavid VertsbergerNBA freelance writerNew York Knicks center Mitchell Robinson (23) controls the ball against Boston Celtics center Robert Williams III (44) during the first quarter at Madison Square Garden. / Brad Penner-USA TODAY SportsOct 20, 2021; New York, New York, USA; New York Knicks forward Obi Toppin (1) dunks over Boston Celtics guard Payton Pritchard (11) and guard Dennis Schroder (71) during the fourth quarter at Madison Square Garden. / Brad Penner-USA TODAY Sports